[arch-dev-public] Announcement Draft: Changes to microcode updates

Changes to microcode updates Microcode on Intel CPUs is no longer loaded automatically, as it needs to be loaded very early in the boot process. This requires adjustments in the bootloader. If you have an Intel CPU, please follow [the instruction in the wiki](https://wiki.archlinux.org/index.php/Microcode#Enabling_Intel_Microcode_Upda...).