fix misformatted docsite link (#31384)

reason: The link is showing verbatim in the docs, where it should only
show "knowledge base article".

Also, generating the docs shows a lot of:

docs/docsite/rst/win_acl_module.rst:424: WARNING: Unknown target name: "know ledge base article<https://access.redhat.com/articles/rhel-top-support-policies>".

docs/templates/plugin.rst.j2

@@ -326,7 +326,7 @@ Maintenance Info
 ~~~~~~~~~~~~~~~~
 
 For more information about Red Hat's this support of this module, please
-refer to this `knowledge base article<https://access.redhat.com/articles/rhel-top-support-policies>`
+refer to this `knowledge base article<https://access.redhat.com/articles/rhel-top-support-policies>`_
 
 {% endif %}
 {% endif %}