Fix another occurance of missing plural

Signed-off-by: Patrick Uiterwijk <patrick@puiterwijk.org>

roles/bodhi2/backend/templates/owner-sync-pagure.j2

@@ -405,7 +405,7 @@ if __name__ == '__main__':
         if verbose:
             print('Determining which projects have the namespace "{0}" and '
                   'branch "{1}"'.format(namespace, tag))
-        namespaces = info['namespace']
+        namespaces = info['namespaces']
         pkgs = []
         for namespace in namespaces:
             for pkg, branches in namespace_to_projects[namespace].items():