Bump docker/build-push-action from 5 to 6

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]>

.github/workflows/lint-test.yml

@@ -108,7 +108,7 @@ jobs:
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern={{major}}
             type=sha
-      - uses: docker/build-push-action@v5
+      - uses: docker/build-push-action@v6
         continue-on-error: false
         with:
           load: true
@@ -127,7 +127,7 @@ jobs:
         continue-on-error: false
         run: |
           docker run --rm "${{ env.image_name }}:${{ env.image_tag }}" bash --version
-      - uses: docker/build-push-action@v5
+      - uses: docker/build-push-action@v6
         continue-on-error: false
         with:
           load: true