dependabot: 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]>

Author: dependabot[bot]

.github/workflows/sdk.yaml

@@ -62,7 +62,7 @@ jobs:
                   password: ${{ secrets.DOCKERHUB_TOKEN }}
 
             - name: Build and push
-              uses: docker/bake-action@v5
+              uses: docker/bake-action@v6
               if: ${{ !startsWith(github.ref, 'refs/tags/sdk@') }}
               with:
                   workdir: packages/sdk