feat: change cnb workflow

Author: zhengkunwang223

.cnb.yml

@@ -15,7 +15,7 @@ main:
 
         - name: docker build and push
           script: docker buildx build 
-            --platform linux/amd64,linux/arm/v7,linux/arm64,linux/ppc64le,linux/s390x 
+            --platform linux/amd64,linux/arm64,linux/ppc64le,linux/s390x 
             --build-arg NODE_VERSION=$NODE_VERSION 
             -t $IMAGE_TAG 
             -f node/Dockerfile