build(deps): bump docker/build-push-action from 6.7.0 to 6.11.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.7.0 to 6.11.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@5cd11c3...b32b51a)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/build_backend.yaml

@@ -33,7 +33,7 @@ jobs:
         uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3.6.1
 
       - name: Build
-        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        uses: docker/build-push-action@b32b51a8eda65d6793cd0494a773d4f6bcef32dc # v6.11.0
         with:
           context: .
           file: ./edc-chat-app-backend/Dockerfile

.github/workflows/build_frontend.yaml

@@ -33,7 +33,7 @@ jobs:
         uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3.6.1
 
       - name: Build
-        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        uses: docker/build-push-action@b32b51a8eda65d6793cd0494a773d4f6bcef32dc # v6.11.0
         with:
           context: .
           file: ./edc-chat-app-ui/Dockerfile-smartsense