Build(deps): bump docker/build-push-action from 6 to 7

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6 to 7.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6...v7)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/dockerimage.yml

@@ -20,7 +20,7 @@ jobs:
 
     # https://github.com/marketplace/actions/build-and-push-docker-images
     - name: Build the Docker image with ${{ env.DOCKER_TAG }} tag
-      uses: docker/build-push-action@v6
+      uses: docker/build-push-action@v7
       with:
         context: .
         tags: ${{ env.DOCKER_TAG }}