make example work with pioarduino/platform-espressif32

works with both stable and develop branches

Author: mhaberler

platformio.ini

@@ -20,8 +20,11 @@ wifi_ssids =
 [env:custom-server]
 ;platform = [email protected]  ; works fine with https
 
-; fails:
+; development fails to compile:
 platform = https://github.com/pioarduino/platform-espressif32.git#develop
+; stable:
+;platform = https://github.com/pioarduino/platform-espressif32/releases/download/51.03.03/platform-espressif32.zip
+
 ; board = m5stack-cores3
 board = esp32-s3-devkitc-1-32MB-8MB