Bump mfinelli/setup-shfmt from 2 to 3

Bumps [mfinelli/setup-shfmt](https://github.com/mfinelli/setup-shfmt) from 2 to 3.
- [Release notes](https://github.com/mfinelli/setup-shfmt/releases)
- [Changelog](https://github.com/mfinelli/setup-shfmt/blob/master/CHANGELOG.md)
- [Commits](mfinelli/setup-shfmt@v2...v3)

---
updated-dependencies:
- dependency-name: mfinelli/setup-shfmt
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/lint.yml

@@ -13,7 +13,7 @@ jobs:
         with:
           additional_files: app/*
           ignore_names: pass
-      - uses: mfinelli/setup-shfmt@v2
+      - uses: mfinelli/setup-shfmt@v3
       - run: shfmt -d app
       - uses: crate-ci/typos@master
       - uses: errata-ai/vale-action@reviewdog