Appease -Werror=type-equality-requires-operators

GHC 9.4 complains:

    The use of ‘~’ without TypeOperators
    will become an error in a future GHC release.

XMonad/Layout/Groups/Examples.hs

@@ -1,5 +1,8 @@
 {-# OPTIONS_GHC -fno-warn-missing-signatures #-}
-{-# LANGUAGE MultiParamTypeClasses, Rank2Types, TypeFamilies #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
+{-# LANGUAGE Rank2Types #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE TypeOperators #-}
 
 -----------------------------------------------------------------------------
 -- |

XMonad/Util/Parser.hs

@@ -5,6 +5,7 @@
 {-# LANGUAGE ScopedTypeVariables        #-}
 {-# LANGUAGE TypeApplications           #-}
 {-# LANGUAGE TypeFamilies               #-}
+{-# LANGUAGE TypeOperators              #-}
 --------------------------------------------------------------------
 -- |
 -- Module      : XMonad.Util.Parser