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: I3bcd15ed9ef26177daed8e5fdfe252e0d37f4ed0
diff --git a/docs/oem-extension-numbering.md b/docs/oem-extension-numbering.md
index 9afa33a..7575e9e 100644
--- a/docs/oem-extension-numbering.md
+++ b/docs/oem-extension-numbering.md
@@ -56,7 +56,7 @@
 
 ### OpenBMC OEM Cmd Codes
 
-```
+```c
 /*
  * This is the OpenBMC IANA OEM Number
  */
diff --git a/scripts/entity-example.md b/scripts/entity-example.md
index 4ca8924..abeb581 100644
--- a/scripts/entity-example.md
+++ b/scripts/entity-example.md
@@ -3,20 +3,20 @@
 If your platform requires the entity container map, you can provide a json file
 of the format:
 
-```
+```json
 [
   {
-     "id" : 1,
-     "containerEntityId" : 2,
-     "containerEntityInstance" : 3,
-     "isList" : false,
-     "isLinked" : false,
-     "entities" : [
-         {"id" : 1, "instance" : 2},
-         {"id" : 1, "instance" : 3},
-         {"id" : 1, "instance" : 4},
-         {"id" : 1, "instance" : 5}
-     ]
+    "id": 1,
+    "containerEntityId": 2,
+    "containerEntityInstance": 3,
+    "isList": false,
+    "isLinked": false,
+    "entities": [
+      { "id": 1, "instance": 2 },
+      { "id": 1, "instance": 3 },
+      { "id": 1, "instance": 4 },
+      { "id": 1, "instance": 5 }
+    ]
   }
 ]
 ```
@@ -25,7 +25,7 @@
 
 The above json is identical to the original YAML documented below:
 
-```
+```text
 # This record has:
 # Container Entity Id and Container Entity Instance = (0x13, 0x81)
 # Contained Entity Id and Contained Entity Instance = (0x0A, 0x1),