Ensure v4 branch publishes using v4 branch (#1173)

Author: frederikprijck

.github/actions/npm-publish/action.yml

@@ -44,7 +44,7 @@ runs:
         elif [[ "${VERSION}" == *"alpha"* ]]; then
           TAG="alpha"
         else
-          TAG="latest"
+          TAG="legacy-v4"
         fi
         npm publish --provenance --tag $TAG
       env: