Fix MD040 warnings

The following warnings are generated by using markdownlint analysis:
```
MD040/fenced-code-language Fenced code blocks should have a language specified [Context: "```"]
```
Refer to markdown-lint [1] to fix MD040
[1]: https://github.com/updownpress/markdown-lint/blob/master/rules/040-fenced-code-language.md

Signed-off-by: George Liu <liuxiwei@ieisystem.com>
Change-Id: Ie984f706001b77f1f791b53a9801b595f775ec09
diff --git a/README.md b/README.md
index 1085270..bdc799b 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@
 
 Then run these commands in the source directory.
 
-```
+```sh
 ./autogen.sh --prefix=/usr
 make install
 ```
@@ -32,7 +32,7 @@
 
 Then run these commands in the source directory.
 
-```
+```sh
 ./autogen.sh
 make
 make install
@@ -45,7 +45,7 @@
 
 Then run these commands in the source directory.
 
-```
+```sh
 ./bootstrap.sh
 ./configure
 make
@@ -58,7 +58,7 @@
 
 Then run these commands in the source directory.
 
-```
+```sh
 meson setup -Dexamples=false -Dtests=disabled builddir
 ninja -C builddir
 ninja -C builddir install
@@ -71,7 +71,7 @@
 
 Then run these commands in the source directory.
 
-```
+```sh
 ./bootstrap.sh
 ./configure --disable-build-bmc-blob-handler
 make
@@ -80,7 +80,7 @@
 
 _NOTE:_ When building from the OpenBMC SDK your configuration call will be:
 
-```
+```sh
 ./configure --enable-oe-sdk --host "$(uname -m)" --disable-build-bmc-blob-handler AR=x86_64-openbmc-linux-gcc-ar RANLIB=x86_64-openbmc-linux-gcc-ranlib
 ```
 
diff --git a/bmc/README.md b/bmc/README.md
index 48e02aa..207a1e1 100644
--- a/bmc/README.md
+++ b/bmc/README.md
@@ -13,26 +13,26 @@
 
 An example config file -
 
-```
+```json
 {
-    "blob": "/flash/adm1266_sink0",
-    "handler": {
-        "type": "file",
-        "path": "/var/run/adm1266/adm1266_sink0.hex"
+  "blob": "/flash/adm1266_sink0",
+  "handler": {
+    "type": "file",
+    "path": "/var/run/adm1266/adm1266_sink0.hex"
+  },
+  "actions": {
+    "preparation": {
+      "type": "skip"
     },
-    "actions": {
-        "preparation": {
-            "type": "skip"
-        },
-        "verification": {
-            "type": "systemd",
-            "unit": "adm1266-verify@sink0.service"
-        },
-        "update": {
-            "type": "systemd",
-            "unit": "adm1266-update@sink0.service"
-        }
+    "verification": {
+      "type": "systemd",
+      "unit": "adm1266-verify@sink0.service"
+    },
+    "update": {
+      "type": "systemd",
+      "unit": "adm1266-update@sink0.service"
     }
+  }
 }
 ```
 
@@ -55,23 +55,23 @@
 
 ### Workflow of log handler
 
-```
+```json
 {
-    "blob": "/log/blackbox_adm1266_sink0",
-    "handler": {
-        "type": "file",
-        "path": "/var/run/adm1266/adm1266_sink0.log"
+  "blob": "/log/blackbox_adm1266_sink0",
+  "handler": {
+    "type": "file",
+    "path": "/var/run/adm1266/adm1266_sink0.log"
+  },
+  "actions": {
+    "open": {
+      "type": "systemd",
+      "unit": "adm1266-read-blackbox-log@sink0.service"
     },
-    "actions":{
-        "open": {
-            "type": "systemd",
-            "unit": "adm1266-read-blackbox-log@sink0.service"
-        },
-        "delete": {
-            "type": "systemd",
-            "unit": "adm1266-clear-blackbox-data@sink0.service"
-        }
+    "delete": {
+      "type": "systemd",
+      "unit": "adm1266-clear-blackbox-data@sink0.service"
     }
+  }
 }
 ```
 
diff --git a/bmc_json_config.md b/bmc_json_config.md
index 2c85638..0de4cde 100644
--- a/bmc_json_config.md
+++ b/bmc_json_config.md
@@ -18,28 +18,30 @@
 This file is generated from configuration and therefore some values can be
 replaced, here we're using the defaults.
 
-```
-[{
+```json
+[
+  {
     "blob": "/flash/bios",
     "handler": {
-        "type": "file",
-        "path": "/tmp/bios-image"
+      "type": "file",
+      "path": "/tmp/bios-image"
     },
     "actions": {
-        "preparation": {
-            "type": "systemd",
-            "unit": "phosphor-ipmi-flash-bios-prepare.target"
-        },
-        "verification": {
-            "type": "systemd",
-            "unit": "phosphor-ipmi-flash-bios-verify.target"
-        },
-        "update": {
-            "type": "systemd",
-            "unit": "phosphor-ipmi-flash-bios-update.target"
-        }
+      "preparation": {
+        "type": "systemd",
+        "unit": "phosphor-ipmi-flash-bios-prepare.target"
+      },
+      "verification": {
+        "type": "systemd",
+        "unit": "phosphor-ipmi-flash-bios-verify.target"
+      },
+      "update": {
+        "type": "systemd",
+        "unit": "phosphor-ipmi-flash-bios-update.target"
+      }
     }
-}]
+  }
+]
 ```
 
 Each json file is expected to be an array of flash handler configurations. You
@@ -115,27 +117,29 @@
 This file is generated from configuration and therefore some values can be
 replaced, here we're using the defaults.
 
-```
-[{
+```json
+[
+  {
     "blob": "/flash/image",
     "handler": {
-        "type": "file",
-        "path": "/run/initramfs/bmc-image"
+      "type": "file",
+      "path": "/run/initramfs/bmc-image"
     },
     "actions": {
-        "preparation": {
-            "type": "systemd",
-            "unit": "phosphor-ipmi-flash-bmc-prepare.target"
-        },
-        "verification": {
-            "type": "systemd",
-            "unit": "phosphor-ipmi-flash-bmc-verify.target"
-        },
-        "update": {
-            "type": "reboot"
-        }
+      "preparation": {
+        "type": "systemd",
+        "unit": "phosphor-ipmi-flash-bmc-prepare.target"
+      },
+      "verification": {
+        "type": "systemd",
+        "unit": "phosphor-ipmi-flash-bmc-verify.target"
+      },
+      "update": {
+        "type": "reboot"
+      }
     }
-}]
+  }
+]
 ```
 
 Given the bios configuration, we can skip the parts of this configuration that
@@ -147,28 +151,30 @@
 This file is generated from configuration and therefore some values can be
 replaced, here we're using the defaults.
 
-```
-[{
+```json
+[
+  {
     "blob": "/flash/image",
     "handler": {
-        "type": "file",
-        "path": "/run/initramfs/bmc-image"
+      "type": "file",
+      "path": "/run/initramfs/bmc-image"
     },
     "actions": {
-        "preparation": {
-            "type": "systemd",
-            "unit": "phosphor-ipmi-flash-bmc-prepare.target"
-        },
-        "verification": {
-            "type": "systemd",
-            "unit": "phosphor-ipmi-flash-bmc-verify.target"
-        },
-        "update": {
-            "type": "systemd",
-            "unit": "phosphor-ipmi-flash-bmc-update.target"
-        }
+      "preparation": {
+        "type": "systemd",
+        "unit": "phosphor-ipmi-flash-bmc-prepare.target"
+      },
+      "verification": {
+        "type": "systemd",
+        "unit": "phosphor-ipmi-flash-bmc-verify.target"
+      },
+      "update": {
+        "type": "systemd",
+        "unit": "phosphor-ipmi-flash-bmc-update.target"
+      }
     }
-}]
+  }
+]
 ```
 
 This configuration is of no significance in its difference.