🐛 Fix NimBLE compilation with Arduino compiler

Author: leon0399

src/BLESerial.h

@@ -262,7 +262,11 @@ class BLESerialServerCallbacks : public BLEServerCallbacks {
   public:
     explicit BLESerialServerCallbacks(BLESerial<T>* bleSerial) : bleSerial(bleSerial) {}
 
+    #if defined(BLESERIAL_USE_NIMBLE) && BLESERIAL_USE_NIMBLE
     void onDisconnect(BLEServer* pServer) override
+    #else // BLESERIAL_USE_NIMBLE
+    void onDisconnect(NimBLEServer* pServer) override
+    #endif // BLESERIAL_USE_NIMBLE
     {
         auto* pAdvertising = pServer->getAdvertising();
         if (pAdvertising == nullptr) {