Update alpine-mainline.yml

Author: alessfg

.github/workflows/alpine-mainline.yml

@@ -110,7 +110,8 @@ jobs:
         id: build
         uses: docker/build-push-action@b32b51a8eda65d6793cd0494a773d4f6bcef32dc # v6.11.0
         with:
-          platforms: linux/amd64, linux/arm/v6, linux/arm/v7, linux/arm64, linux/386, linux/ppc64le, linux/riscv64, linux/s390x
+          platforms: linux/amd64, linux/arm/v6, linux/arm/v7, linux/arm64, linux/386, linux/ppc64le, linux/s390x
+          # platforms: linux/amd64, linux/arm/v6, linux/arm/v7, linux/arm64, linux/386, linux/ppc64le, linux/riscv64, linux/s390x
           context: "{{ defaultContext }}:mainline/alpine-slim"
           labels: ${{ steps.meta.outputs.labels }}
           annotations: ${{ steps.meta.outputs.annotations }}