Bump softprops/action-gh-release from 2.5.0 to 2.6.1 (#301)

Bumps [softprops/action-gh-release](https://github.com/softprops/action-gh-release) from 2.5.0 to 2.6.1.
- [Release notes](https://github.com/softprops/action-gh-release/releases)
- [Changelog](https://github.com/softprops/action-gh-release/blob/master/CHANGELOG.md)
- [Commits](softprops/action-gh-release@a06a81a...153bb8e)

---
updated-dependencies:
- dependency-name: softprops/action-gh-release
  dependency-version: 2.6.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/build-containers.yml

@@ -68,7 +68,7 @@ jobs:
           repository: 'flowforge/docker-compose'
 
       - name: Add assets to the release
-        uses: softprops/action-gh-release@a06a81a03ee405af7f2048a818ed3f03bbf83c7b # v2.5.0
+        uses: softprops/action-gh-release@153bb8e04406b158c6c84fc1615b65b24149a1fe # v2.6.1
         with:
           files: |
             docker-compose.yml