Add astyle as a dependency to Building-in-Ubuntu docs

docs/development/building/Building-in-Ubuntu.md

@@ -7,7 +7,7 @@ This document is tested and based on the latest Ubuntu 22.04 LTS release and can
 
 ```
 $ sudo apt update && sudo apt upgrade
-$ sudo apt install build-essential libblocksruntime-dev libtool git curl clang-12
+$ sudo apt install build-essential libblocksruntime-dev libtool git curl clang-12 astyle
 $ git clone https://github.com/betaflight/betaflight.git
 $ cd betaflight
 $ make arm_sdk_install