update README to indicate gpt-oss:20b for 32GB RAM

Author: chuangtc

README.md

@@ -81,7 +81,7 @@ When memory RAM size is greater than 31GB, it will check if these models exist.
 ```bash
 ollama pull phi4:14b
 ollama pull deepseek-r1:14b
-ollama pull deepseek-r1:32b
+ollama pull gpt-oss:20b
 ```
 
 ## Python Poetry manually(advanced) installation