Bump haskell-actions/run-fourmolu from 11 to 12 (#1048)

Bumps [haskell-actions/run-fourmolu](https://github.com/haskell-actions/run-fourmolu) from 11 to 12.
- [Release notes](https://github.com/haskell-actions/run-fourmolu/releases)
- [Changelog](https://github.com/haskell-actions/run-fourmolu/blob/master/CHANGELOG.md)
- [Commits](haskell-actions/run-fourmolu@v11...v12)

---
updated-dependencies:
- dependency-name: haskell-actions/run-fourmolu
  dependency-version: '12'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/linting.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
 
-    - uses: haskell-actions/run-fourmolu@v11
+    - uses: haskell-actions/run-fourmolu@v12
       with:
         version: "0.18.0.0"
         pattern: |