Attempt to enable tests for 9.6.3 windows

.github/workflows/validate.yml

@@ -37,8 +37,8 @@ jobs:
       GHC_FOR_RELEASE: ${{ format('["{0}"]', env.GHC_FOR_RELEASE) }}
     strategy:
       matrix:
-        os: ["ubuntu-latest", "macos-latest", "windows-latest"]
-        ghc: ["9.6.3", "9.4.7", "9.2.8", "9.0.2", "8.10.7", "8.8.4", "8.6.5", "8.4.4"]
+        os: ["windows-latest"]
+        ghc: ["9.6.3"]
         exclude:
           # corrupts GHA cache or the fabric of reality itself, see https://github.com/haskell/cabal/issues/8356
           - os: "windows-latest"
@@ -161,15 +161,13 @@ jobs:
         # Have to disable *-suite validation:
         # - the [email protected] problem is tracked at https://github.com/haskell/cabal/issues/8858
         # - but curently can't run it with GHC 9.6, tracking: https://github.com/haskell/cabal/issues/8883
-        if: (runner.os != 'Windows')  || (matrix.ghc != '9.6.3')
         run: sh validate.sh $FLAGS -s lib-suite
 
       - name: Validate cli-tests
         run: sh validate.sh $FLAGS -s cli-tests
 
       - name: Validate cli-suite
         # Have to disable *-suite validation, see above the comment for lib-suite
-        if: (runner.os != 'Windows')  || (matrix.ghc != '9.6.3')
         run: sh validate.sh $FLAGS -s cli-suite
 
   validate-old-ghcs: