Update win_firewall_rule.py (#2337)

added profile examples as my firewall task would pass yet no firewall rule was created until I added

profile: Domain,Private,Public

When setting a Firewall rule on Windows Server 2008 R2 manually, these three are selected as default, useful to have in the documentation maybe?

lib/ansible/modules/extras/windows/win_firewall_rule.py

@@ -97,7 +97,7 @@ options:
         required: false
     profile:
         description:
-            - the profile this rule applies to
+            - the profile this rule applies to, e.g. Domain,Private,Public
         default: null
         required: false
     force: