fix ref in readme

Author: finger563

README.md

@@ -46,8 +46,8 @@ To use the components in this repository, you have a few options:
    `ble_gatt_server` components, you could run:
 
      ```console
-     idf.py add-dependency "esp-cpp/task^0.21.0"
-     idf.py add-dependency "esp-cpp/ble_gatt_server^0.21.0"
+     idf.py add-dependency "espp/task^0.21.0"
+     idf.py add-dependency "espp/ble_gatt_server^0.21.0"
      ```
    
    Alternatively, you could add the following dependencies to your