Update ArchWiki links in "AUR Home"

(AUR Home is displayed if you are not logged in, e.g. in browser's incognito tab.)

Could you replace "AUR User Guidelines" with "https://wiki.archlinux.org/title/Arch_User_Repository" and "Arch Packaging Standards" with "https://wiki.archlinux.org/title/Arch_package_guidelines"?

Wiki pages were renamed, it does not make sense to keep old names in AUR web interface.

Also, I think it is worth to linkify the first "PKGBUILD" to "https://wiki.archlinux.org/title/PKGBUILD".

Also, I think it is worth to linkify "vote" (in "Remember to vote for your favourite packages!") to "https://wiki.archlinux.org/title/Arch_User_Repository#Voting_for_packages".

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information