ci: bump mikepenz/release-changelog-builder-action from 4 to 6

Bumps [mikepenz/release-changelog-builder-action](https://github.com/mikepenz/release-changelog-builder-action) from 4 to 6.
- [Release notes](https://github.com/mikepenz/release-changelog-builder-action/releases)
- [Commits](mikepenz/release-changelog-builder-action@v4...v6)

---
updated-dependencies:
- dependency-name: mikepenz/release-changelog-builder-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/release.yml

@@ -15,7 +15,7 @@ jobs:
 
       - name: Build changelog
         id: changelog
-        uses: mikepenz/release-changelog-builder-action@v4
+        uses: mikepenz/release-changelog-builder-action@v6
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           toTag: ${{ github.event.release.tag_name }}