Update failed: Failed to retrieve some files

[pheiduck]

Some time ago, [Community] and [Extra] were merged:
Steps to solve this:

@Yochanan

The [community] repository has been merged into [extra] and is now empty. It may take a bit of time for mirrors to catch up.

Update your system and merge the pacman pacnew /etc/pacman.conf.pacnew file.

sudo pacman -Syu "pacman>=6.0.2-11"