Fix arithmetic parenthesis

Author: phadej

haskell-ci.cabal

@@ -1,6 +1,6 @@
 cabal-version:      2.2
 name:               haskell-ci
-version:            0.19.20250710
+version:            0.19.20250722
 synopsis:           Haskell CI script generator
 description:
   Script generator (@haskell-ci@) for

src/HaskellCI/ShVersionRange.hs

@@ -217,7 +217,7 @@ freeToArith z
         $ "! (" ++ go 0 x ++ ") || " ++ go 2 y
 
     parens :: Bool -> String -> String
-    parens True  s = "{ " ++ s ++ "; }"
+    parens True  s = "(" ++ s ++ ")"
     parens False s = s
 
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