Merge pull request #472 from ruby/dependabot/github_actions/docker/build-push-action-6

Bump docker/build-push-action from 5 to 6

Author: kateinoigakukun

.github/workflows/build.yml

@@ -60,7 +60,7 @@ jobs:
         id: meta
         with:
           images: ghcr.io/${{ github.repository_owner }}/ruby.wasm/builder/${{ matrix.entry.target }}
-      - uses: docker/build-push-action@v5
+      - uses: docker/build-push-action@v6
         with:
           context: builders/${{ matrix.entry.target }}
           push: ${{ github.ref == 'refs/heads/main' || github.ref == 'refs/tags/*' }}
@@ -113,7 +113,7 @@ jobs:
           path: ./rubies
           key: ${{ matrix.entry.rubies_cache_key }}
       - uses: docker/setup-buildx-action@v3
-      - uses: docker/build-push-action@v5
+      - uses: docker/build-push-action@v6
         id: builder-image
         with:
           context: builders/${{ matrix.entry.builder }}