Bump docker/build-push-action from 6.19.2 to 7.0.0 (#80)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.19.2 to 7.0.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@10e90e3...d08e5c3)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -87,7 +87,7 @@ jobs:
 
       - name: Build and push by digest
         id: build
-        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6.19.2
+        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294 # v7.0.0
         with:
           platforms: ${{ matrix.platform }}
           outputs: type=image,name=gcr.io/${{ env.PROJECT_ID }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=${{ github.event_name != 'pull_request' && env.SERVICE_ACCOUNT != '' }}