Fix: agent template error. (#9784)

### What problem does this PR solve?

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

agent/templates/trip_planner.json

@@ -4,7 +4,7 @@
     "title": {
 		"en": "Trip Planner",
 		"zh": "旅行规划"},
-    "description": 
+    "description": {
 		"en": "This smart trip planner utilizes LLM technology to automatically generate customized travel itineraries, with optional tool integration for enhanced reliability.",
 		"zh": "智能旅行规划将利用大模型自动生成定制化的旅行行程，附带可选工具集成，以增强可靠性。"},
 	"canvas_type": "Consumer App",