Fix BF instructions

Author: wvarty

docs/software/mavlink.md

@@ -101,8 +101,8 @@ The minimum versions to use this feature are:
 
     For the below steps, when a UART connection is mentioned, it will be written as `UARTx`. Replace `x` with the UART number you are using.
 
-    1. In the Ports tab, set the UARTx `Telemetry Output` to `MAVLink`, and the baud rate to `460800`. Make sure `RX Serial` is disabled.
-    1. In the Receiver tab, set the Receiver type to `SERIAL` and the `Serial Receiver Provider` to `MAVLink`.
+    1. In the Ports tab, on the UARTx row, make sure `RX Serial` is enabled, set the `Telemetry Output` to `MAVLink`, and the baud rate to `460800`.
+    1. In the Receiver tab, set the Receiver type to `Serial (via UART)` and the `Serial Receiver Provider` to `MAVLINK`.
     1. Save and reboot the flight controller.
 
 ## Handset Setup