Fix doc about fetching frontend npm packages

Change-Id: I9527e4484c67c4415e37c2ffe2cdf539ab258ace
diff --git a/polygerrit-ui/README.md b/polygerrit-ui/README.md
index c5dd657..3f84a58 100644
--- a/polygerrit-ui/README.md
+++ b/polygerrit-ui/README.md
@@ -64,7 +64,7 @@
 bazel fetch @ui_dev_npm//:node_modules
 
 # Install packages from tools/node_tools/packages.json
-bazel fetch @ui_dev_npm//:node_modules
+bazel fetch @tools_npm//:node_modules
 ```
 
 More information for installing and using nodejs rules can be found here https://bazelbuild.github.io/rules_nodejs/install.html
@@ -274,4 +274,4 @@
 
 If you are willing to join the queue and help the community review changes,
 you can create an issue through Monorail and request to join the queue!
-We will review your request and start from there.
\ No newline at end of file
+We will review your request and start from there.