Fix MD033 warnings

The following warnings are generated by using markdownlint analysis:
```
docs/Network-Configuration.md:60:70 MD033/no-inline-html Inline HTML [Element: interface]
docs/Network-Configuration.md:62:49 MD033/no-inline-html Inline HTML [Element: ip]
docs/Network-Configuration.md:62:55 MD033/no-inline-html Inline HTML [Element: subnetmask]
docs/Network-Configuration.md:63:2 MD033/no-inline-html Inline HTML [Element: networkgateway]
docs/Network-Configuration.md:66:59 MD033/no-inline-html Inline HTML [Element: ip]
docs/Network-Configuration.md:66:79 MD033/no-inline-html Inline HTML [Element: networkGateway]
docs/Network-Configuration.md:66:65 MD033/no-inline-html Inline HTML [Element: subnetmask]
docs/Network-Configuration.md:85:2 MD033/no-inline-html Inline HTML [Element: DefaultGateway]
docs/Network-Configuration.md:109:61 MD033/no-inline-html Inline HTML [Element: HostName]
docs/Network-Configuration.md:112:2 MD033/no-inline-html Inline HTML [Element: hostname]
docs/Network-Configuration.md:118:47 MD033/no-inline-html Inline HTML [Element: id]
docs/Network-Configuration.md:118:30 MD033/no-inline-html Inline HTML [Element: interface]
```
Refer to markdown-lint [1] to fix MD033
[1]: https://github.com/updownpress/markdown-lint/blob/master/rules/033-no-inline-html.md

Signed-off-by: George Liu <liuxiwei@ieisystem.com>
Change-Id: I3663a69b9a250a4fbfa071716413ce1ea21a3257
diff --git a/docs/Network-Configuration.md b/docs/Network-Configuration.md
index a5dcea5..7b7004d 100644
--- a/docs/Network-Configuration.md
+++ b/docs/Network-Configuration.md
@@ -57,6 +57,7 @@
 
 ## Configure IP address:
 
+```sh
 busctl call xyz.openbmc_project.Network /xyz/openbmc_project/network/<interface>
 xyz.openbmc_project.Network.IP.Create IP ssys
 "xyz.openbmc_project.Network.IP.Protocol.IPv4" "<ip>" <subnetmask>
@@ -65,20 +66,24 @@
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X POST -d
 '{"data":["xyz.openbmc_project.Network.IP.Protocol.IPv4","<ip>",<subnetmask>,"<networkGateway>"]
 }' https://<hostname/ip>/xyz/openbmc_project/network/eth0/action/IP
+```
 
 ## Configure Default Gateway
 
 ### Get
 
+```sh
 busctl get-property xyz.openbmc_project.Network
 /xyz/openbmc_project/network/config
 xyz.openbmc_project.Network.SystemConfiguration DefaultGateway
 
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X GET
 https://<hostname/ip>/xyz/openbmc_project/network/config/attr/DefaultGateway
+```
 
 ### Set
 
+```sh
 busctl set-property xyz.openbmc_project.Network
 /xyz/openbmc_project/network/config
 xyz.openbmc_project.Network.SystemConfiguration DefaultGateway s
@@ -87,6 +92,7 @@
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X PUT -d '{"data":
 "x.x.x.x"}'
 https://<hostname/ip>/xyz/openbmc_project/network/config/attr/DefaultGateway
+```
 
 NOTE: Since the system does not allow unpingable gateway address, make sure the
 gateway address is pingable.
@@ -95,15 +101,18 @@
 
 ### Get
 
+```sh
 busctl get-property xyz.openbmc_project.Network
 /xyz/openbmc_project/network/config
 xyz.openbmc_project.Network.SystemConfiguration HostName
 
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X GET
 https://<hostname/ip>/xyz/openbmc_project/network/config/attr/HostName
+```
 
 ### Set
 
+```sh
 busctl set-property xyz.openbmc_project.Network
 /xyz/openbmc_project/network/config
 xyz.openbmc_project.Network.SystemConfiguration HostName s "<HostName>"
@@ -111,55 +120,67 @@
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X PUT -d '{"data":
 "<hostname>"}'
 https://<hostname/ip>/xyz/openbmc_project/network/config/attr/HostName
+```
 
 ## Delete IP address
 
+```sh
 busctl call xyz.openbmc_project.Network
 /xyz/openbmc_project/network/<interface>/ipv4/<id>
 xyz.openbmc_project.Object.Delete Delete
+```
 
 NOTE: How to get the ipv4/id: After creating the IP address object enumerate the
 network interface object.
 
+```sh
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X DELETE
 https://<hostname/ip>/xyz/openbmc_project/network/eth0/ipv4/fbfc29b
+```
 
 ## Configure DHCP
 
 ### Get
 
+```sh
 busctl get-property xyz.openbmc_project.Network
 /xyz/openbmc_project/network/eth0 xyz.openbmc_project.Network.EthernetInterface
 DHCPEnabled
 
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X GET
 https://<hostname/ip>/xyz/openbmc_project/network/eth0/attr/DHCPEnabled
+```
 
 ### Set
 
+```sh
 busctl set-property xyz.openbmc_project.Network
 /xyz/openbmc_project/network/eth0 xyz.openbmc_project.Network.EthernetInterface
 DHCPEnabled b 1
 
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X PUT -d '{"data":
 1}' https://<hostname/ip>/xyz/openbmc_project/network/eth0/attr/DHCPEnabled
+```
 
 ## Configure MACAddress
 
 ### Get
 
+```sh
 busctl get-property xyz.openbmc_project.Network
 /xyz/openbmc_project/network/eth0 xyz.openbmc_project.Network.MACAddress
 MACAddress
 
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X GET
 https://<hostname/ip>/xyz/openbmc_project/network/eth0/attr/MACAddress
+```
 
 ### Set
 
 NOTE: MAC address should be LOCAL ADMIN MAC (2nd bit of first byte should be
 on).
 
+```sh
 busctl set-property xyz.openbmc_project.Network
 /xyz/openbmc_project/network/eth0 xyz.openbmc_project.Network.MACAddress
 MACAddress s "XX:XX:XX:XX:XX:XX"
@@ -167,35 +188,44 @@
 curl -c cjar -b cjar -k -H "Content-Type: application/jon" -X PUT -d '{"data":
 "XX:XX:XX:XX:XX:XX" }'
 https://<hostname/ip>/xyz/openbmc_project/network/eth0/attr/MACAddress
+```
 
 ## Network factory reset
 
+```sh
 busctl call xyz.openbmc_project.Network /xyz/openbmc_project/network
 xyz.openbmc_project.Common.FactoryReset Reset
 
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X POST -d
 '{"data":[] }' https://<hostname/ip>/xyz/openbmc_project/network/action/Reset
+```
 
 ## VLAN
 
 ### Create
 
+```sh
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X POST -d
 '{"data":["eth0",50] }'
 https://<hostname/ip>/xyz/openbmc_project/network/action/VLAN
+```
 
 ### Delete
 
+```sh
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X DELETE
 https://<hostname/ip>/xyz/openbmc_project/network/eth0_50
 
 busctl call xyz.openbmc_project.Network /xyz/openbmc_project/network/eth0_50
 xyz.openbmc_project.Object.Delete Delete
+```
 
 ### Enumerate
 
+```sh
 curl -c cjar -b cjar -k -H "Content-Type: application/json" -X GET
 https://<hostname/ip>/xyz/openbmc_project/network/eth0_50/enumerate
+```
 
 ### Configure IP on VLAN Interface