Bump Cabal on CI

Author: martijnbastiaan

.github/workflows/ci.yml

@@ -32,7 +32,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        cabal: ["3.6"]
+        cabal: ["3.12.1.0"]
         ghc:
           - "8.6.5"
           - "8.10.7"