Update platformio.ini

Author: Jason2866

examples/arduino-matter-light/platformio.ini

@@ -9,7 +9,7 @@
 
 
 [env:esp32-c6-devkitc-1]
-platform = https://github.com/pioarduino/platform-espressif32/releases/download/stable/platform-espressif32.zip
+platform = espressif32
 framework = arduino
 board_build.partitions = huge_app.csv
 build_flags = -DCHIP_HAVE_CONFIG_H