Fix link to pubrules doc

Author: vivienlacourba

_data/submenu-publication-policies.yml

@@ -6,7 +6,7 @@ pages:
   url: https://www.w3.org/pubrules/
 
 - title: About pubrules
-  url: https://www.w3.org/pubrules/doct
+  url: https://www.w3.org/pubrules/doc
 
 - title: Version Management in W3C Technical Reports
   url: https://www.w3.org/2005/05/tr-versions