Fine tweaks to template descriptions (#2264)

### What problem does this PR solve?


### Type of change


- [x] Documentation Update

agent/templates/general_chat_bot.json

@@ -1,7 +1,7 @@
 {
   "id": 1,
-  "title": "Chat bot",
-  "description": "A general chat bot. It is based on Self-RAG mechanism. What you need to do is setting up knowleage base in 'Retrieval'",
+  "title": "General-purpose chatbot",
+  "description": "A general-purpose chatbot based on Self-RAG. Let's begin by setting up your knowledge base in 'Retrieval'!",
   "canvas_type": "chatbot",
   "dsl": {
     "answer": [],