Enable the Cite extension in the MediaWiki config

This is used to create references as footnotes.
See https://www.mediawiki.org/wiki/Extension:Cite

Closes #124

site-cookbooks/kosmos-mediawiki/recipes/default.rb

@@ -246,6 +246,8 @@ $wgArticlePath = "/$1";
                                  "wfLoadExtension( 'Mermaid' );")
     file.insert_line_if_no_match(/WikiEditor/,
                                  "wfLoadExtension( 'WikiEditor' );")
+    file.insert_line_if_no_match(/Cite/,
+                                 "wfLoadExtension( 'Cite' );")
 
     if node["mediawiki"]["ldap_enabled"]
       file.insert_line_if_no_match(/# LDAP config/,