Fixed link to documentation standards

Author: sivolobov

contributing/documentation/overview.rst

@@ -68,7 +68,7 @@ memorable name for the new branch:
 
 **Step 5.** Now make your changes in the documentation. Add, tweak, reword and
 even remove any content, but make sure that you comply with the
-doc:`/contributing/documentation/standards`.
+:doc:`/contributing/documentation/standards`.
 
 **Step 6.** **Push** the changes to your forked repository: