ci: build amd64 and arm64 images (#1187)

Author: ddlees

.github/actions/build-container-image/action.yml

@@ -164,17 +164,14 @@ runs:
 
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v3
-      with:
-        platforms: ${{ inputs.build_platforms }}
 
     - name: Set up buildx
       uses: docker/setup-buildx-action@v3
-      with:
-        platforms: ${{ inputs.build_platforms }}
 
     - name: Build
       uses: docker/build-push-action@v6
       with:
+        platforms: ${{ inputs.build_platforms }}
         build-args: ${{ inputs.build_args }}
         build-contexts: ${{ inputs.build_contexts }}
         cache-from: ${{ inputs.cache_from }}