deps(gha): bump docker/build-push-action from 6 to 7

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6 to 7.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6...v7)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/release.yml

@@ -149,7 +149,7 @@ jobs:
       # Build Image -> Stage: cpp-devbox-base
       - name: 📦 🚀 Build Image ➔ Stage cpp-devbox-base
         id: build-base
-        uses: docker/build-push-action@v6 # https://github.com/docker/build-push-action
+        uses: docker/build-push-action@v7 # https://github.com/docker/build-push-action
         with:
           context: .
           file: .devcontainer/debian/${{ matrix.config.debian_version }}-${{ matrix.config.debian_codename }}/Dockerfile
@@ -165,7 +165,7 @@ jobs:
       # Build Image -> Stages: cpp-devbox-base + cpp-devbox-with-vulkansdk = with-vulkansdk
       - name: 📦 🚀 Build Image ➔ Stage cpp-devbox-with-vulkansdk
         id: build-base-with-vulkansdk
-        uses: docker/build-push-action@v6 # https://github.com/docker/build-push-action
+        uses: docker/build-push-action@v7 # https://github.com/docker/build-push-action
         with:
           context: .
           file: .devcontainer/debian/${{ matrix.config.debian_version }}-${{ matrix.config.debian_codename }}/Dockerfile