build(deps): bump tj-actions/changed-files from 18.3 to 18.4 (#3917)

Bumps [tj-actions/changed-files](https://github.com/tj-actions/changed-files) from 18.3 to 18.4.
- [Release notes](https://github.com/tj-actions/changed-files/releases)
- [Changelog](https://github.com/tj-actions/changed-files/blob/main/HISTORY.md)
- [Commits](https://github.com/tj-actions/changed-files/compare/v18.3...v18.4)

---
updated-dependencies:
- dependency-name: tj-actions/changed-files
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

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

.github/workflows/test.yml

@@ -222,7 +222,7 @@ jobs:
       # only run this job if the database format might have changed
       - name: Get specific changed files
         id: changed-files-specific
-        uses: tj-actions/changed-files@v18.3
+        uses: tj-actions/changed-files@v18.4
         with:
           files: |
             zebra-state/**/config.rs