Fix code to attach 'latest' tag to most-recently-built CLI Docker image. (#1018)

Author: BenBirt

scripts/publish

@@ -24,5 +24,6 @@ VERSION=$(cat version.bzl | grep DF_VERSION | awk '{ print $3 }' | sed "s/\"//g"
 git tag $VERSION
 git push origin $VERSION
 
+docker pull dataformco/dataform:$VERSION
 docker tag dataformco/dataform:$VERSION dataformco/dataform:latest
 docker push dataformco/dataform:latest