Update plugins/trugen/README.md

updated readme changes to installation commands

Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: deemedai

plugins/trugen/README.md

@@ -19,7 +19,7 @@ npm install @livekit/agents-plugin-trugen
 or
 
 ```bash
-pnpm add @livekit/agent-plugin-trugen
+pnpm add @livekit/agents-plugin-trugen
 ```
 
 ## Pre-requisites