Merge branch 'new_pacman_conf' into 'main'

Adapt pacman.conf according to the Arch Git Migration

See merge request crystal/misc/iso!1

crystal/pacman.conf

@@ -78,19 +78,16 @@ Include = /etc/pacman.d/crystal-mirrorlist
 [crystal-any]
 Include = /etc/pacman.d/crystal-mirrorlist
 
-#[testing]
+#[core-testing]
 #Include = /etc/pacman.d/mirrorlist
 
 [core]
 Include = /etc/pacman.d/mirrorlist
 
-[extra]
-Include = /etc/pacman.d/mirrorlist
-
-#[community-testing]
+#[extra-testing]
 #Include = /etc/pacman.d/mirrorlist
 
-[community]
+[extra]
 Include = /etc/pacman.d/mirrorlist
 
 # If you want to run 32 bit applications on your x86_64 system,