Typo: mo[u]dules

Fix typo: moudules -> modules

docsite/rst/developing_modules.rst

@@ -18,7 +18,7 @@ The directory "./library", alongside your top level playbooks, is also automatic
 added as a search directory.
 
 Should you develop an interesting Ansible module, consider sending a pull request to the
-`moudules-extras project <http://github.com/ansible/ansible-modules-extras>`_.  There's also a core
+`modules-extras project <http://github.com/ansible/ansible-modules-extras>`_.  There's also a core
 repo for more established and widely used modules.  "Extras" modules may be promoted to core periodically,
 but there's no fundamental difference in the end - both ship with ansible, all in one package, regardless
 of how you acquire ansible.