fix: Add written instruction as well for "device is active" error

[okand]

this is all the video tells/shows you to do anyway

[Zeglius]

Im certain there is more to just Bitlocker, like fastboot. Also "deleting" is not an option if the user plans to dualboot, maybe "disabling" would be better.

[okand]

I'm sure there are cleaner ways to fix this that takes those use-cases in account too. I just wanted to not have to watch a 3 minute video only to be told this.

[okand]

If you're gonna use bitlocker and simultaneously dualboot you're gonna have to shrink your encrypted Windows partition from Windows first and if you do so then the Bazzite installer should just let you install on the free space that is there. It is specifically removing it that makes it freak out with a vague error like this.

[Zeglius]

Right, we can add mention of disabling bitlocker in the dual-booting section