build(deps): 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/build-and-push.yml

@@ -105,7 +105,7 @@ jobs:
           # Output the complete annotations string.
           echo "annotations=$annotations" >> "$GITHUB_OUTPUT"
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: ./${{ env.CONTAINER }}
           platforms: linux/amd64,linux/arm64

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Build Dockerfile
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: ./devcontainer
           load: true
@@ -53,7 +53,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Build Dockerfile
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: ./wasicontainer
           load: true
@@ -81,7 +81,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Build Dockerfile
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: ./autoconf
           build-args: AUTOCONF_VERSION=${{ matrix.autoconf_version }}