CI: Pin cabal-install version to 3.14.*

`haskell-ci` defaults to `cabal-install-3.12.*` (see
haskell-CI/haskell-ci#766), but we need
`cabal-install-3.14.*` in order for the GHC 9.12 build to succeed.

Author: RyanGlScott

.github/workflows/haskell-ci.yml

@@ -96,8 +96,8 @@ jobs:
           chmod a+x "$HOME/.ghcup/bin/ghcup"
       - name: Install cabal-install
         run: |
-          "$HOME/.ghcup/bin/ghcup" install cabal 3.12.1.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
-          echo "CABAL=$HOME/.ghcup/bin/cabal-3.12.1.0 -vnormal+nowrap" >> "$GITHUB_ENV"
+          "$HOME/.ghcup/bin/ghcup" install cabal 3.14.1.1 || (cat "$HOME"/.ghcup/logs/*.* && false)
+          echo "CABAL=$HOME/.ghcup/bin/cabal-3.14.1.1 -vnormal+nowrap" >> "$GITHUB_ENV"
       - name: Install GHC (GHCup)
         if: matrix.setup-method == 'ghcup'
         run: |

cabal.haskell-ci

@@ -2,3 +2,5 @@ distribution:           jammy
 no-tests-no-benchmarks: False
 unconstrained:          False
 run-tests:              False
+-- Work around https://github.com/haskell-CI/haskell-ci/issues/766
+cabal-install-version:  3.14.1.1