Update README.md

Author: PerfecXX

README.md

@@ -5,7 +5,7 @@
 
 Update or append the data to Google Sheet, or get the data on Google Sheet.  
 By using HTTP to execute the Google Apps Script API.  
-Compatible with ESP32 and ESP8266.
+Compatible with ESP32.
 
 # Getting Started
 - [Installation](https://github.com/PerfecXX/MicroPython-GoogleSheet/blob/main/doc/md/installation.md)