Change PlatformIO staging reference

code/platformio.ini

@@ -5,7 +5,7 @@ data_dir = espurna/data
 
 [common]
 platform = espressif8266
-#platform = espressif8266_stage
+#platform = https://github.com/platformio/platform-espressif8266.git#feature/stage
 build_flags = -g -DMQTT_MAX_PACKET_SIZE=400 ${env.ESPURNA_FLAGS}
 debug_flags = -DDEBUG_ESP_CORE -DDEBUG_ESP_SSL -DDEBUG_ESP_WIFI -DDEBUG_ESP_HTTP_CLIENT -DDEBUG_ESP_HTTP_UPDATE -DDEBUG_ESP_HTTP_SERVER -DDEBUG_ESP_UPDATER -DDEBUG_ESP_OTA -DDEBUG_TLS_MEM
 build_flags_512k = ${common.build_flags} -Wl,-Tesp8266.flash.512k0.ld