build(deps): bump haskell-actions/setup from 2.7.5 to 2.7.6

Bumps [haskell-actions/setup](https://github.com/haskell-actions/setup) from 2.7.5 to 2.7.6.
- [Release notes](https://github.com/haskell-actions/setup/releases)
- [Commits](haskell-actions/setup@ec49483...dd344bc)

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

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

.github/workflows/tests.yml

@@ -105,7 +105,7 @@ jobs:
           key: ${{ steps.resolve-resolver.outputs.resolver }}-${{ steps.week-no.outputs.week-no }}-${{ hashFiles('exercises/**/package.yaml') }}
           restore-keys: ${{ steps.resolve-resolver.outputs.resolver }}-${{ steps.week-no.outputs.week-no }}-
 
-      - uses: haskell-actions/setup@ec49483bfc012387b227434aba94f59a6ecd0900
+      - uses: haskell-actions/setup@dd344bc1cec854a369df8814ce17ef337d6e6170
         with:
           enable-stack: true
           stack-version: "latest"