Bringing back the backticks

Author: ThomasLandauer

doctrine/custom_dql_functions.rst

@@ -146,4 +146,4 @@ In Symfony, you can register your custom DQL functions as follows:
                 ],
             ]);
 
-.. _DQL User Defined Functions: https://www.doctrine-project.org/projects/doctrine-orm/en/current/cookbook/dql-user-defined-functions.html
+.. _`DQL User Defined Functions`: https://www.doctrine-project.org/projects/doctrine-orm/en/current/cookbook/dql-user-defined-functions.html