Bump docker/build-push-action from 6.7.0 to 6.8.0 (#344)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.7.0 to 6.8.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6.7.0...v6.8.0)

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

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

.github/workflows/check_versions.yml

@@ -33,7 +33,7 @@ jobs:
       latestverhash: ${{ steps.latest-version.outputs.latestverhash }}
     steps:
       - name: Build image
-        uses: docker/build-push-action@v6.7.0
+        uses: docker/build-push-action@v6.8.0
         with:
           push: false
           load: true

.github/workflows/on_pr.yml

@@ -99,7 +99,7 @@ jobs:
       # Build
       - name: Test Build
         if: steps.changed-files-specific.outputs.any_changed == 'true'
-        uses: docker/build-push-action@v6.7.0
+        uses: docker/build-push-action@v6.8.0
         with:
           context: .
           file: ./Dockerfile
@@ -115,7 +115,7 @@ jobs:
       # Build nohealthcheck
       - name: Test Build nohealthcheck
         if: steps.changed-files-specific.outputs.any_changed == 'true'
-        uses: docker/build-push-action@v6.7.0
+        uses: docker/build-push-action@v6.8.0
         with:
           context: .
           file: ./Dockerfile.nohealthcheck