Bump docker/bake-action from 5 to 6

Bumps [docker/bake-action](https://github.com/docker/bake-action) from 5 to 6.
- [Release notes](https://github.com/docker/bake-action/releases)
- [Commits](docker/bake-action@v5...v6)

---
updated-dependencies:
- dependency-name: docker/bake-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/reusable-test.yml

@@ -35,7 +35,7 @@ jobs:
           mkdir -p /tmp/.buildx-cache-new
 
       - name: Bake docker images
-        uses: docker/bake-action@v5
+        uses: docker/bake-action@v6
         with:
           load: true
           set: |