Bump docker/build-push-action from 3 to 4

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 3 to 4.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v3...v4)

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

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

Author: dependabot[bot]

.github/workflows/docker.yaml

@@ -29,7 +29,7 @@ jobs:
           registry: ghcr.io
           username: ryodocx
           password: ${{ secrets.GITHUB_TOKEN }}
-      - uses: docker/build-push-action@v3
+      - uses: docker/build-push-action@v4
         with:
           context: .
           push: true