update readme

Author: Xiaojieqiu

README.md

@@ -1,5 +1,5 @@
 <p align="center">
-  <img height="150" src="https://github.com/aristoteleo/spateo-release/blob/main/docs/_static/logo.png" />
+  <img height="150" src="https://raw.githubusercontent.com/aristoteleo/spateo-release/main/docs/_static/logo.png" />
 </p
 
 [![documentation](https://readthedocs.org/projects/spateo-release/badge/?version=latest)](https://spateo-release.readthedocs.io/en/latest/)