docs: Numerous spelling and grammer fixes in flight controller section (#26582)

docs/en/flight_controller/mindracer.md

@@ -1,6 +1,6 @@
 # MindRacer Hardware
 
-:::warning
+::: warning
 PX4 does not manufacture this (or any) autopilot.
 Contact the [manufacturer](http://mindpx.net) for hardware support or compliance issues.
 :::
@@ -59,14 +59,14 @@ The main hardware documentation is [here](http://mindpx.net/assets/accessories/m
 
 ### How to Build
 
-:::tip
+::: tip
 Most users will not need to build this firmware!
 It is pre-built and automatically installed by _QGroundControl_ when appropriate hardware is connected.
 :::
 
 To [build PX4](../dev_setup/building_px4.md) for this target:
 
-```
+```sh
 make airmind_mindpx-v2_default
 ```
 
@@ -79,7 +79,7 @@ MindRacer has an attached Adapt IO board.
 MindRacer has a built-in UART-to-USB converter.
 To connect a companion computer, stack MindRacer on an interface board, and connect the companion computer to the USB port on the interface board.
 
-And the max BAUD rate is the same with px4 family, which is up to 921600.
+And the max BAUD rate is the same as for the PX4 family, which is up to 921600.
 
 ### User Guide
 
@@ -87,7 +87,7 @@ And the max BAUD rate is the same with px4 family, which is up to 921600.
 The user guide is [here](http://mindpx.net/assets/accessories/mindracer_user_guide_v1.2.pdf)
 :::
 
-## Where to Buy
+## Where to Buy {#store}
 
 MindRacer is available at [AirMind Store](https://airmind.mindpx.net/catalog).
 You can also find MindRacer at Amazon<sup>&reg;</sup> or eBay<sup>&reg;</sup>.