Update BLE_client.ino (#3463)

fix typo

libraries/BLE/examples/BLE_client/BLE_client.ino

@@ -154,7 +154,7 @@ void loop() {
     // Set the characteristic's value to be the array of bytes that is actually a string.
     pRemoteCharacteristic->writeValue(newValue.c_str(), newValue.length());
   }else if(doScan){
-    BLEDevice::getScan()->start(0);  // this is just eample to start scan after disconnect, most likely there is better way to do it in arduino
+    BLEDevice::getScan()->start(0);  // this is just example to start scan after disconnect, most likely there is better way to do it in arduino
   }
   
   delay(1000); // Delay a second between loops.