Bump haskell/actions from 1.2 to 2.4

Bumps [haskell/actions](https://github.com/haskell/actions) from 1.2 to 2.4.
- [Release notes](https://github.com/haskell/actions/releases)
- [Commits](haskell/actions@v1.2...v2.4)

---
updated-dependencies:
- dependency-name: haskell/actions
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/haskell.yml

@@ -23,7 +23,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - uses: haskell/actions/setup@v1.2
+    - uses: haskell/actions/setup@v2.4
       id: setup-haskell-cabal
       name: Setup Haskell
       with: