update README

bin/data-migrations/README.md

@@ -8,8 +8,9 @@
 git clone https://github.com/weseek/growi
 cd growi/bin/data-migrations
 
-NETWORK=growi_devcontainer_default \
-MONGO_URI=mongodb://growi_devcontainer_mongo_1/growi \
+NETWORK=growi_devcontainer_default
+MONGO_URI=mongodb://growi_devcontainer_mongo_1/growi
+
 docker run --rm \
   --network $NETWORK \
   -v "$(pwd)"/src:/opt \