Bump ludeeus/action-shellcheck from 0.1.0 to 2.0.0

Bumps [ludeeus/action-shellcheck](https://github.com/ludeeus/action-shellcheck) from 0.1.0 to 2.0.0.
- [Release notes](https://github.com/ludeeus/action-shellcheck/releases)
- [Commits](ludeeus/action-shellcheck@0.1.0...2.0.0)

---
updated-dependencies:
- dependency-name: ludeeus/action-shellcheck
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/tests.yml

@@ -8,4 +8,4 @@ jobs:
     - name: run tests
       run: make test
     - name: shellcheck
-      uses: ludeeus/action-shellcheck@0.1.0
+      uses: ludeeus/action-shellcheck@2.0.0