Bump tj-actions/changed-files from 39 to 40

Bumps [tj-actions/changed-files](https://github.com/tj-actions/changed-files) from 39 to 40.
- [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/v39...v40)

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

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

.github/workflows/changed.yml

@@ -7,7 +7,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         fetch-depth: 0
-    - uses: tj-actions/changed-files@v39
+    - uses: tj-actions/changed-files@v40
       id: changed-files
       with:
         files: '**/*.md'