docs: add blank line

Author: songkg7

README.md

@@ -95,5 +95,6 @@ Welcome to write articles about O2!
 ## License
 
 This project is published under [MIT](https://choosealicense.com/licenses/mit/) license.
-[![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/V7V8KX38Q)
 
+
+[![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/V7V8KX38Q)