Bump docker/build-push-action from 6.11.0 to 6.15.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.11.0 to 6.15.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](https://github.com/docker/build-push-action/compare/v6.11.0...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] <support@github.com>

.github/workflows/on-pull-request.yml

@@ -37,7 +37,7 @@ jobs:
             type=ref,event=branch
             type=edge,branch=main
       - name: Build 
-        uses: docker/build-push-action@v6.11.0
+        uses: docker/build-push-action@v6.15.0
         with:
           platforms: ${{ env.PLATFORMS }}
           push: false

.github/workflows/on-push.yml

@@ -50,7 +50,7 @@ jobs:
             type=ref,event=branch
             type=edge,branch=main
       - name: Build and push ${{ github.repository }}:${{ steps.git.outputs.image_tag }}
-        uses: docker/build-push-action@v6.11.0
+        uses: docker/build-push-action@v6.15.0
         with:
           platforms: ${{ env.PLATFORMS }}
           push: true

.github/workflows/on-release.yml

@@ -40,7 +40,7 @@ jobs:
             type=ref,event=branch
             type=ref,event=tag
       - name: Build and push
-        uses: docker/build-push-action@v6.11.0
+        uses: docker/build-push-action@v6.15.0
         with:
           platforms: ${{ env.PLATFORMS }}
           push: true