build(deps): bump redhat-plumbers-in-action/differential-shellcheck

Bumps [redhat-plumbers-in-action/differential-shellcheck](https://github.com/redhat-plumbers-in-action/differential-shellcheck) from 5.0.1 to 5.0.2.
- [Release notes](https://github.com/redhat-plumbers-in-action/differential-shellcheck/releases)
- [Changelog](https://github.com/redhat-plumbers-in-action/differential-shellcheck/blob/main/docs/CHANGELOG.md)
- [Commits](redhat-plumbers-in-action/differential-shellcheck@aa647ec...91e2582)

---
updated-dependencies:
- dependency-name: redhat-plumbers-in-action/differential-shellcheck
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/differential-shellcheck.yml

@@ -28,7 +28,7 @@ jobs:
           fetch-depth: 0
 
       - name: Differential ShellCheck
-        uses: redhat-plumbers-in-action/differential-shellcheck@aa647ec4466543e8555c2c3b648124a9813cee44
+        uses: redhat-plumbers-in-action/differential-shellcheck@91e2582e40236f831458392d905578d680baa138
         with:
           # exclude all `.in` files because they may contain unsupported syntax, and they have to be preprocessed first
           exclude-path: '**/*.in'