Add context on supported Linux builds and their directories on 'Building Linux apps with Flutter' page

[theRealProHacker]

Page URL

https://docs.flutter.dev/development/platform-integration/linux/building/

Page source

https://github.com/flutter/website/tree/main/src/development/platform-integration/linux/building.md

Describe the problem

It says build/linux/<build mode>/bundle/contains everything but at least on ubuntu 22.04.1 there is only a x64-directory in build/linux which then contains the <build mode> directory. This error cost me some time debugging my CI/CD, because I constantly got a file or directory not found error

Expected fix

Make some kind of distinction on which systems this rule applies exactly and add the above example.

Additional context

No response