GHA: bump cache version

Hopefully fixes

    ghc-9.6.2: panic! (the 'impossible' happened)
      GHC version 9.6.2:
    	ModOrigin: hidden module redefined
      x: unusable module
      y: unusable module

Author: amesgen

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
          os: [ubuntu-latest]
     env:
       # Modify this value to "invalidate" the Cabal cache.
-      CABAL_CACHE_VERSION: "2023-09-04"
+      CABAL_CACHE_VERSION: "2023-09-25"
 
     steps:
     - uses: actions/checkout@v4