GHA: bump cabal to 3.12.1.0

Author: amesgen

.github/workflows/checks.yml

@@ -51,7 +51,7 @@ jobs:
       uses: input-output-hk/actions/haskell@latest
       id: setup-haskell
       with:
-        cabal-version: "3.10.1.0"
+        cabal-version: "3.12.1.0"
 
     - uses: actions/checkout@v4
 

.github/workflows/ci.yml

@@ -38,7 +38,7 @@ jobs:
       # Modify this value to "invalidate" the Cabal cache.
       CABAL_CACHE_VERSION: "2024-01-29"
 
-      CABAL: "3.10.3.0"
+      CABAL: "3.12.1.0"
 
     steps:
     - uses: actions/checkout@v4