Update README.md

Author: extremeheat

docs/README.md

@@ -85,7 +85,7 @@ const mineflayer = require('mineflayer')
 
 const bot = mineflayer.createBot({
   host: 'localhost', // minecraft server ip
-  username: 'Bot', // username to join as if auth is `offline`, else a unique identifier for caching. Switch if you want to change accounts
+  username: 'Bot', // username to join as if auth is `offline`, else a unique identifier for this account. Switch if you want to change accounts
   auth: 'microsoft' // for offline mode servers, you can set this to 'offline'
   // port: 25565,              // set if you need a port that isn't 25565
   // version: false,           // only set if you need a specific version or snapshot (ie: "1.8.9" or "1.16.5"), otherwise it's set automatically