Update NimBLE_Async_Client.ino

updated message to indicate scan restarting, not just ending.

Author: vlucent

examples/NimBLE_Async_Client/NimBLE_Async_Client.ino

@@ -50,7 +50,7 @@ class ScanCallbacks : public NimBLEScanCallbacks {
     }
 
     void onScanEnd(const NimBLEScanResults& results, int reason) override {
-        Serial.printf("Scan Ended\n");
+        Serial.printf("Scan ended reason = %d; restarting scan\n", reason);
         NimBLEDevice::getScan()->start(scanTimeMs);
     }
 } scanCallbacks;