build(deps): bump masesgroup/retrieve-changed-files from 3 to 4

Bumps [masesgroup/retrieve-changed-files](https://github.com/masesgroup/retrieve-changed-files) from 3 to 4.
- [Release notes](https://github.com/masesgroup/retrieve-changed-files/releases)
- [Commits](masesgroup/retrieve-changed-files@v3...v4)

---
updated-dependencies:
- dependency-name: masesgroup/retrieve-changed-files
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build-webpage.yml

@@ -27,7 +27,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - id: files
-        uses: masesgroup/retrieve-changed-files@v3
+        uses: masesgroup/retrieve-changed-files@v4
         with:
           format: "csv"
       - name: Use Node.js