Update README.md (#10148)

Co-authored-by: Lucas Saavedra Vaz <32426024+lucasssvaz@users.noreply.github.com>

libraries/BLE/README.md

 # ESP32 BLE for Arduino
 The Arduino IDE provides an excellent library package manager where versions of libraries can be downloaded and installed.  This Github project provides the repository for the ESP32 BLE support for Arduino.
 
-The actual source of the project which is being maintained can be found here:
+The original source of the project, **which is not maintained anymore**, can be found here: https://github.com/nkolban/esp32-snippets
 
-https://github.com/nkolban/esp32-snippets
+Issues and questions should be raised here: https://github.com/espressif/arduino-esp32/issues <br> (please don't use https://github.com/nkolban/esp32-snippets/issues!)
 
-Issues and questions should be raised here:
-
-https://github.com/nkolban/esp32-snippets/issues
-
-
-Documentation for using the library can be found here:
-
-https://github.com/nkolban/esp32-snippets/tree/master/Documentation
+Documentation for using the library can be found here: https://github.com/nkolban/esp32-snippets/tree/master/Documentation