wta: Change N,or monoid to Word,or

This was also renamed accordingly in CoPaR itself

src/random-wta/Main.hs

@@ -36,14 +36,14 @@ data Opts = Opts
 readMonoid :: Options.ReadM SomeMonoid
 readMonoid = Options.eitherReader $ \case
   "Z,max"    -> Right (SomeMonoid MaxInt)
-  "N,or"     -> Right (SomeMonoid OrWord)
+  "Word,or"  -> Right (SomeMonoid OrWord)
   "powerset" -> Right (SomeMonoid Powerset)
   _ ->
     Left
       $  "Unknown monoid type. Valid values are '"
       <> "Z,max"
       <> "', '"
-      <> "N,or"
+      <> "Word,or"
       <> "' and '"
       <> "powerset"
       <> "'"
@@ -63,7 +63,7 @@ parseOpts =
             (  "Monoid to use. Valid valies are '"
             <> "Z,max"
             <> "', '"
-            <> "N,or"
+            <> "Word,or"
             <> "' and '"
             <> "powerset"
             <> "'"