chore(deps): bump docker/build-push-action from 5 to 6

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

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

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

Author: dependabot[bot]

.github/workflows/build-project.yml

@@ -55,7 +55,7 @@ jobs:
           npm run-script build
       - name: Build docker image
         if: ${{ github.event_name == 'pull_request' }}
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           # Set the context to use the packages/compas-open-scd directory and not execute it's own git checkout.
           context: packages/compas-open-scd

.github/workflows/release-project.yml

@@ -48,7 +48,7 @@ jobs:
           npm ci
           npm run-script build
       - name: Build and push docker image to Docker Hub
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           # Set the context to use the packages/compas-open-scd directory and not execute it's own git checkout.
           context: packages/compas-open-scd