Fix link in reST template

There was a missing trailing underscore (`_`) that would have marked the
content in the backticks as a link. This adds it and fixes the link on
every core module page.

hacking/templates/rst.j2

@@ -111,7 +111,7 @@ This source of this module is hosted on GitHub in the `ansible-modules-core <htt
   
 If you believe you have found a bug in this module, and are already running the latest stable or development version of Ansbile, first look in the `issue tracker at github.com/ansible/ansible-modules-core <http://github.com/ansible/ansible-modules-core>`_ to see if a bug has already been filed.  If not, we would be greatful if you would file one.
 
-Should you have a question rather than a bug report, inquries are welcome on the `ansible-project google group <https://groups.google.com/forum/#!forum/ansible-project>` or on Ansible's "#ansible" channel, located on irc.freenode.net.   Development oriented topics should instead use the similar `ansible-devel google group <https://groups.google.com/forum/#!forum/ansible-project>`_.
+Should you have a question rather than a bug report, inquries are welcome on the `ansible-project google group <https://groups.google.com/forum/#!forum/ansible-project>`_ or on Ansible's "#ansible" channel, located on irc.freenode.net.   Development oriented topics should instead use the similar `ansible-devel google group <https://groups.google.com/forum/#!forum/ansible-project>`_.
 
 Documentation updates for this module can also be edited directly by submitting a pull request to the module source code, just look for the "DOCUMENTATION" block in the source tree.