Bump haskell/actions from 1 to 2

Bumps [haskell/actions](https://github.com/haskell/actions) from 1 to 2.
- [Release notes](https://github.com/haskell/actions/releases)
- [Commits](haskell/actions@v1...v2)

---
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/ci-ubuntu.yml

@@ -98,7 +98,7 @@ jobs:
 
       - name: Install ghc and cabal
         if: steps.cache-cabal.outputs.cache-hit != 'true'
-        uses: haskell/actions/setup@v1
+        uses: haskell/actions/setup@v2
         with:
           ghc-version: ${{ env.GHC_VERSION }}
           cabal-version: ${{ env.CABAL_VERSION }}