Fix readme

Author: auxten

README.md

@@ -33,11 +33,11 @@
 
 ## Arch
 <div align="center">
-  <img src="docs/_static/arch-chdb.png" height="300">
+  <img src="docs/_static/arch-chdb.png" width="700">
 </div>
 
 ## Installation
-Currently, chDB only supports Python 3.7+ on macOS and Linux.
+Currently, chDB only supports Python 3.7+ on macOS(x86_64 and ARM64) and Linux.
 ```bash
 pip install chdb
 ```