chore(deps): bump docker/build-push-action from 5 to 6 (#72)

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](https://github.com/docker/build-push-action/compare/v5...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/docker-publish-osurx.yml

@@ -44,7 +44,7 @@ jobs:
           type=sha,prefix=osurx-
 
     - name: Build and push Docker image (osu!RX)
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         context: .
         file: ./Dockerfile-osurx

.github/workflows/docker-publish.yml

@@ -44,7 +44,7 @@ jobs:
           type=sha,prefix={{branch}}-
 
     - name: Build and push Docker image
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         context: .
         file: ./Dockerfile