Update updating_pkgs.rst

Author: ForgottenProgramme

src/maintainer/updating_pkgs.rst

@@ -228,7 +228,7 @@ an issue in the feedstock repository with the following title:
 
 ``@conda-forge-admin, please add user @username``
 
-where ``@username`` is the username of the new maintainer to be added.
+where ``username`` is the username of the new maintainer to be added.
 A PR will be automatically created and a maintainer or a member of the ``core`` can then merge this PR to add the user. 
 
 .. note::