adding missing items in the documentation of mysql server facts (#51676)

* adding missing items in the documentation of mysql server facts

* removed trailing whitespace

lib/ansible/modules/cloud/azure/azure_rm_mysqlserver_facts.py

@@ -106,6 +106,24 @@ servers:
                     returned: always
                     type: int
                     sample: 2
+        storage_mb:
+            description:
+                - The maximum storage allowed for a server.
+            returned: always
+            type: int
+            sample: 128000
+        enforce_ssl:
+            description:
+                - Enable SSL enforcement.
+            returned: always
+            type: bool
+            sample: False
+        admin_username:
+            description:
+                - "The administrator's login name of a server."
+            returned: always
+            type: str
+            sample: serveradmin
         version:
             description:
                 - Server version.