asahi: fix link, explicitly mention efi partition

[dkwo]

Fixed a link, and deleted a package that is installed as dependency.

Since a user on reddit was confused about this, I mentioned explicitly that the efi partition is the one created by asahi installer (the user must not create a new one themselves).

[dkwo]

Migh also be worth mention (from asahi docs):

When selecting the minimal UEFI environment installation option, the Asahi Installer can be directed to create free space for a future root filesystem. Your guide must instruct users to use this facility to prepare their disk for your distribution rather than attempting to manually shrink or alter APFS containers via your installer.

Your installation procedure must encourage manual partitioning, with a section in your guide explaining the dangers of carelessly altering the partition table. Users must be made aware that it is never safe to alter or rearrange any disk structure other than the free space left by the Asahi Installer.

[dkwo]

link checker seems broken..

[dkwo]

@classabbyamp Any other change before this can be merged?