Address comments

Author: minggangw

ts_demo/topics/package.json

@@ -2,7 +2,7 @@
   "name": "rclnodejs-ts-topics-demo",
   "version": "1.0.0",
   "description": "TypeScript demo for rclnodejs topics (publisher and subscriber)",
-  "main": "index.js",
+  "main": "dist/publisher.js",
   "scripts": {
     "prebuild": "npm run clean",
     "build": "tsc",

ts_demo/topics/src/publisher.ts

@@ -8,7 +8,7 @@
 import * as rclnodejs from 'rclnodejs';
 
 const TOPIC_NAME = 'ts_demo';
-const PUBLISH_INTERVAL = 1000000000n; // milliseconds
+const PUBLISH_INTERVAL = 1000000000n; // nanoseconds
 
 /**
  * Main publisher function