Docs: update supported versions
Description
- Changed supported Ubuntu versions
- Added LinuxMint 21 nadeko-bash-installer!32 (merged)
Notes
Ubuntu versions https://gitlab.com/Kwoth/nadeko-bash-installer/-/blob/v5/detectOS.sh?ref_type=heads#L86
Ubuntu versions https://gitlab.com/Kwoth/nadeko-bash-installer/-/blob/v5/detectOS.sh?ref_type=heads#L86