Update README.md

Author: pelikhan

README.md

@@ -38,7 +38,8 @@ Keep your agentic workflows up to date with the latest features and improvements
 Upgrade the AW engine version and update your workflows:
 
 ```bash
-gh aw upgrade  # Upgrade to latest gh-aw engine version
+gh extensions upgrade github/gh-aw # Update cli extensiô
+gh aw upgrade  # Upgrade to latest gh aw engine version
 gh aw update   # Update added workflows
 ```