Update wio-terminal-connect-hub.md

2-farm/lessons/4-migrate-your-plant-to-the-cloud/wio-terminal-connect-hub.md

@@ -110,7 +110,7 @@ The next step is to connect your device to IoT Hub.
     initTime();
     ```
 
-1. Add the following variable declaration to the top of the file, just below the included directives:
+1. Add the following variable declaration to the top of the file, just below the included directive:
 
     ```cpp
     IOTHUB_DEVICE_CLIENT_LL_HANDLE _device_ll_handle;