Bump docker/build-push-action from 6.9.0 to 6.15.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.9.0 to 6.15.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6.9.0...v6.15.0)

---
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]>

Author: dependabot[bot]

.github/workflows/build-container-image.yaml

@@ -51,7 +51,7 @@ jobs:
           platforms: linux/arm64,linux/amd64
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@v6.9.0
+        uses: docker/build-push-action@v6.15.0
         with:
           context: .
           file: .container/Dockerfile

.github/workflows/build-graalvm-container-image.yaml

@@ -55,7 +55,7 @@ jobs:
 
       - name: Build and push Docker image
         id: image_build
-        uses: docker/build-push-action@v6.9.0
+        uses: docker/build-push-action@v6.15.0
         with:
           context: .
           file: .container/Dockerfile.graalvm
@@ -113,7 +113,7 @@ jobs:
 
       - name: Build and push Docker image
         id: image_build
-        uses: docker/build-push-action@v6.9.0
+        uses: docker/build-push-action@v6.15.0
         with:
           context: .
           file: .container/Dockerfile.graalvm