Update unordered-containers.cabal

Co-authored-by: konsumlamm <[email protected]>

Author: Jeffrey Young

unordered-containers.cabal

@@ -43,10 +43,10 @@ flag debug
   default:      False
 
 flag sse42
-  description: Instruct GHC to *not* use -msse4.2. Typical use case is to allow
+  description: Instruct GHC to use -msse4.2. Disable this to allow
                older architectures to use unordered-containers. Only relevant
                for x86; expect performance regressions on newer architectures
-               when enabled.
+               when disabled.
   default:     True
   manual:      True