Update README.md

Author: Jason2866

README.md

@@ -45,12 +45,12 @@ board = ...
 ...
 ```
 
-### Development version
-espressif Arduino repo branch master and latest compiled Arduino libs
+### Bleeding edged development version
+based on devel branch Arduino 3.1.0 and IDF 5.3.0
 
 ```ini
 [env:development]
-platform = https://github.com/pioarduino/platform-espressif32.git#develop
+platform = https://github.com/pioarduino/platform-espressif32.git#Arduino/IDF53
 board = ...
 ...
 ```