Add note for STM32 board usage

Add  note for STM32 board usage

 [***Supported STM Boards and how to use***](#1)

README.md

@@ -6,6 +6,9 @@ From v1.0.3+, the library supports more Arduino boards ( SAM DUE, SAMD: ZERO, MK
 
 From v1.0.2+, the library supports many more Arduino boards (Atmel AVR-s, Atmel SAM3X8E ARM Cortex-M3, STM32F series, ESP8266, Intel ARC32(Genuino101), Nordic nRF51(RFduino), Teensy boards, Realtek Ameba(RTL8195A,RTL8710)) using Wiznet W5x00 or ENC28J60 EThernet shields by using [UIPEthernet](https://github.com/UIPEthernet/UIPEthernet) library besides standard [Ethernet library](https://www.arduino.cc/en/Reference/Ethernet).
 
+### Note for STM32 board usage
+Please see the [***Supported STM Boards and how to use***](https://github.com/khoih-prog/EthernetWebServer/issues/1)
+
 This is simple yet complete WebServer library for `AVR, Teensy,SAM, STM32F, Intel, etc.` boards running Ethernet shields. The functions are similar and compatible to ESP8266/ESP32 WebServer libraries to make life much easier to port sketches from ESP8266/ESP32.
 
 The library supports