Fix trophy uid.

Author: Sherry Yang

learn-pr/paths/get-started-ai-apps-agents/index.yml

@@ -36,4 +36,4 @@ modules:
 - learn.wwl.get-started-computer-vision
 - learn.wwl.ai-information-extraction
 trophy:
-  uid: learn.ai-technical-concepts.trophy
+  uid: learn.get-started-ai-apps-agents.trophy