try not even running buildx for build-only

Author: chrisfenner

.github/workflows/docker-publish.yml

@@ -26,13 +26,13 @@ jobs:
       # Set up QEMU for cross-platform builds below
       - name: Set up QEMU
         if: github.event_name == 'release'
-        id: qemu
         uses: docker/setup-qemu-action@v1
         with:
           image: tonistiigi/binfmt:latest
           platforms: all
 
       - name: Setup Docker buildx
+        if: github.event_name == 'release'
         uses: docker/setup-buildx-action@v2
 
       # Extract metadata (tags, labels) for Docker
@@ -60,7 +60,6 @@ jobs:
       # https://github.com/docker/build-push-action
       - name: Validate Docker image build
         if: github.event_name != 'release'
-        id: build-only
         uses: docker/build-push-action@v3
         with:
           context: .
@@ -72,7 +71,6 @@ jobs:
       # https://github.com/docker/build-push-action
       - name: Build and publish Docker image
         if: github.event_name == 'release'
-        id: build-and-push
         uses: docker/build-push-action@v3
         with:
           context: .