Merge pull request #138 from ruby/dependabot/github_actions/docker/setup-buildx-action-4

Bump docker/setup-buildx-action from 3 to 4

Author: hsbt

.github/workflows/publish.yml

@@ -59,7 +59,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: docker/setup-qemu-action@v3
-      - uses: docker/setup-buildx-action@v3
+      - uses: docker/setup-buildx-action@v4
       - uses: docker/login-action@v3
         with:
           username: ${{ github.actor }}