ci: bump haskell-actions/setup from 2.10.3 to 2.11.0 (#29)

Bumps [haskell-actions/setup](https://github.com/haskell-actions/setup) from 2.10.3 to 2.11.0.
- [Release notes](https://github.com/haskell-actions/setup/releases)
- [Commits](haskell-actions/setup@f9150cb...cd0d9bd)

---
updated-dependencies:
- dependency-name: haskell-actions/setup
  dependency-version: 2.11.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/casket-pages.yml

@@ -29,7 +29,7 @@ jobs:
           path: .casket-ssg
 
       - name: Setup GHCup
-        uses: haskell-actions/setup@f9150cb1d140e9a9271700670baa38991e6fa25c # v2
+        uses: haskell-actions/setup@cd0d9bdd65b20557f41bea4dbe43d0b5fbbfe553 # v2
         with:
           ghc-version: '9.8.2'
           cabal-version: '3.10'