Bump docker/build-push-action from 6.17.0 to 6.18.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.17.0 to 6.18.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6.17.0...v6.18.0)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: 6.18.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/container.yml

@@ -87,7 +87,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and export to Docker
-        uses: docker/build-push-action@v6.17.0
+        uses: docker/build-push-action@v6.18.0
         with:
           context: .
           file: ./container/Dockerfile
@@ -100,7 +100,7 @@ jobs:
           docker run --rm ${{ env.TESTIMAGE }} measure
 
       - name: Build and push
-        uses: docker/build-push-action@v6.17.0
+        uses: docker/build-push-action@v6.18.0
         if: ${{ github.event_name != 'pull_request' && steps.prep.outputs.head != 'devel' }}
         with:
           context: .