add sample gif to readme

Author: Doarakko

README.md

@@ -1,5 +1,7 @@
 # kon
 
+![crates](https://img.shields.io/crates/v/kon.svg) ![Licence](https://img.shields.io/github/license/Doarakko/kon)
+
 Display fox image on CLI.
 
 ## Install
@@ -14,6 +16,9 @@ cargo install kon
 kon
 ```
 
+![sample](./sample.gif)
+
+
 ## Credit
 
 - [RandomFox](https://randomfox.ca/)