message: Updated UE4 version reference
diff: @@ -44,7 +44,7 @@ through the [Joystick](https://github.com/simondlevy/MulticopterSim/blob/master/
  ## Toolchain
  You will need Unreal Engine 4 (UE4). I am attempting to use the latest version, which as of the time of this
  -writing is UE4.24. To install UE4, follow these [instructions](https://docs.unrealengine.com/en-US/GettingStarted/Installation/index.html).
  +writing is UE4.25.3. To install UE4, follow these [instructions](https://docs.unrealengine.com/en-US/GettingStarted/Installation/index.html).
  # Build
  