Bump docker/build-push-action from 7.0.0 to 7.1.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 7.0.0 to 7.1.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v7.0.0...v7.1.0)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: 7.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/client-build.yml

@@ -48,7 +48,7 @@ jobs:
 
       # Multi-arch in one buildx push — apk add gettext is the only RUN, fine under QEMU.
       # All real CPU work (ng build) ran natively above; arch-sensitive part is just the nginx base layer.
-      - uses: docker/build-push-action@v7.0.0
+      - uses: docker/build-push-action@v7.1.0
         with:
           context: ./angular-client
           file: ./angular-client/Dockerfile.prebuilt

.github/workflows/scylla-build.yml

@@ -52,7 +52,7 @@ jobs:
 
       # No Docker layer cache (cache-from/cache-to: type=gha) — apt install openssl
       # is ~3s, and COPY invalidates every run anyway. Real build time is cargo, cached above.
-      - uses: docker/build-push-action@v7.0.0
+      - uses: docker/build-push-action@v7.1.0
         with:
           context: ./scylla-server
           file: ./scylla-server/Dockerfile.prebuilt