use multiple workers for multi-platform builds, not qemu

Author: yellowsink

.github/workflows/publish.yml

@@ -12,8 +12,13 @@ jobs:
    publish:
       name: Publish Docker Image to ghcr.io
       runs-on: ubuntu-latest
+      strategy:
+         fail-fast: false
+         matrix:
+            platform: [linux/amd64, linux/arm64]
       permissions:
          packages: write
+
       steps:
          -  name: Check out the repo
             uses: actions/checkout@v4
@@ -58,6 +63,6 @@ jobs:
                file: ./Dockerfile
                push: true
                tags: ${{ env.DOCKER_IMAGE_TAGS }}
-               platforms: linux/amd64,linux/arm64
+               platforms: ${{ matrix.platform }}
                cache-from: type=gha
                cache-to: type=gha,mode=max