updates the network shared docs to include the timeout parameter (#18635)

The network shared doc fragment was missing the timeout parameter from
the docstring.  This commit adds the timeout parameter back to the
doc fragment

lib/ansible/utils/module_docs_fragments/ios.py

@@ -49,6 +49,13 @@ options:
         value of environment variable C(ANSIBLE_NET_PASSWORD) will be used instead.
     required: false
     default: null
+  timeout:
+    description:
+      - Specifies the timeout in seconds for communicating with the network device
+        for either connecting or sending commands.  If the timeout is
+        exceeded before the operation is completed, the module will error
+    require: false
+    default: 10
   ssh_keyfile:
     description:
       - Specifies the SSH key to use to authenticate the connection to