Update README.md

 KHU Academic information notification by Chatbot
 
 - About the Project
-
-  : It provides academic information through chatbots.
+: It provides academic information through chatbots.
 
 - Getting Started ( Installation )
-
-  : This project is provided through Kakao Talk. Go to http://pf.kakao.com/_TxjCMb.
+: This project is provided through Kakao Talk. 
+  Go to http://pf.kakao.com/_TxjCMb. 
   Chatbots are available by adding channels.
   
-  
 - Usage
+: A category that can be selected is provided when accessing the chatbot.
+  Then, if you select an item you want in the category, the result will be provided.
 
 - Roadmap