Avoid having module documentation links to itself (#21329)

* Avoid having module documentation links to itself

A lot of modules use M(own_module) in their documentation causing a link
in the documentation to itself.

* Make note more clear now

lib/ansible/modules/network/asa/asa_command.py

@@ -29,7 +29,7 @@ author: "Peter Sprygada (@privateip), Patrick Ogenstad (@ogenstad)"
 short_description: Run arbitrary commands on Cisco ASA devices.
 description:
   - Sends arbitrary commands to an ASA node and returns the results
-    read from the device. The M(asa_command) module includes an
+    read from the device. The C(asa_command) module includes an
     argument that will cause the module to wait for a specific condition
     before returning or timing out if the condition is not met.
 extends_documentation_fragment: asa

lib/ansible/modules/network/dellos6/dellos6_command.py

@@ -31,7 +31,7 @@ version_added: "2.2"
 short_description: Run commands on remote devices running Dell OS6
 description:
   - Sends arbitrary commands to a Dell OS6 node and returns the results
-    read from the device. The M(dellos6_command) module includes an
+    read from the device. The C(dellos6_command) module includes an
     argument that will cause the module to wait for a specific condition
     before returning or timing out if the condition is not met.
   - This module does not support running commands in configuration mode.

lib/ansible/modules/network/dellos9/dellos9_config.py

@@ -149,7 +149,7 @@ notes:
 
   - This module requires to increase the ssh connection rate limit.
     Use the following command I(ip ssh connection-rate-limit 60)
-    to configure the same. This can be done via M(dellos9_config) module
+    to configure the same. This can be done via C(dellos9_config) module
     as well.
 """
 

lib/ansible/modules/network/junos/junos_netconf.py

@@ -45,7 +45,7 @@ options:
     version_added: "2.2"
   state:
     description:
-      - Specifies the state of the M(junos_netconf) resource on
+      - Specifies the state of the C(junos_netconf) resource on
         the remote device.  If the I(state) argument is set to
         I(present) the netconf service will be configured.  If the
         I(state) argument is set to I(absent) the netconf service

lib/ansible/modules/network/wakeonlan.py

@@ -28,7 +28,7 @@ module: wakeonlan
 version_added: 2.2
 short_description: Send a magic Wake-on-LAN (WoL) broadcast packet
 description:
-   - The M(wakeonlan) module sends magic Wake-on-LAN (WoL) broadcast packets.
+   - The C(wakeonlan) module sends magic Wake-on-LAN (WoL) broadcast packets.
 options:
   mac:
     description: