Update README.md

Author: RetiredWizard

README.md

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 ## PyDOS, PyBASIC, edit... All the functionality of the 1981 IBM PC on a PI Pico?
 
-**MicroPython/CircuitPython DOS-like shell for microcontroller (RP2040, ESP32) boards**   
+**MicroPython/CircuitPython DOS-like shell for microcontroller (RP2040, ESP32-S2/S3) boards**   
 **Check out the demo video at https://www.youtube.com/watch?v=Az_oiq8GE4Y**
 
 To start the shell type **import PyDOS** at the micropython REPL prompt.