Bump docker/build-push-action from 5 to 6 (#143)

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

.github/workflows/build.yml

@@ -33,7 +33,7 @@ jobs:
           labels: |
             org.opencontainers.image.authors=${{ env.AUTHOR }}
       - name: Build Docker image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64

.github/workflows/docker.yml

@@ -45,7 +45,7 @@ jobs:
           labels: |
             org.opencontainers.image.authors=${{ env.AUTHOR }}
       - name: Build container image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64