Update platformio.ini

Author: Jason2866

examples/espidf-arduino-h2zero-BLE_scan/platformio.ini

@@ -10,13 +10,15 @@
 
 [env]
 platform = espressif32
-framework = arduino, espidf
+framework = arduino
 monitor_speed = 115200
 board_build.embed_txtfiles =
     managed_components/espressif__esp_insights/server_certs/https_server.crt
     managed_components/espressif__esp_rainmaker/server_certs/rmaker_mqtt_server.crt
     managed_components/espressif__esp_rainmaker/server_certs/rmaker_claim_service_server.crt
     managed_components/espressif__esp_rainmaker/server_certs/rmaker_ota_server.crt
+lib_deps =
+    https://github.com/h2zero/NimBLE-Arduino.git#nimble-1.6-c6-build-working
 lib_ignore =
     BLE
     BluetoothSerial