update 3.8 a 3.9

README.md

@@ -3,7 +3,7 @@
 🌍
 *[English](/docs/README-en.md) ∙ [简体中文](README.md)*
 
-基于`python3.8`和`Django4.0`的博客。   
+基于`python3.9`和`Django4.0`的博客。   
 
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