Update README.md

Author: luc-github

README.md

@@ -69,7 +69,7 @@ Feedback on 2.0 was : ESP3D being a library is not really useful and make setup
 1. Please follow installation of the ESP core you want to use : [ESP8266 core version](https://github.com/esp8266/Arduino)  or [ESP32 core version](https://github.com/espressif/arduino-esp32)   
 2.  Add manually libraries present in libraries directory -these versions are verified to work with ESP3D, any others (newer version) may cause untested behavior.  
 
-Use webserver support (recommended as stable):  
+Use webserver support (recommended as stable), asyncwebserver support is no more stable on ESP3D 
 * arduinoWebSockets from @Links2004  
 
 Generic ones: