Add ROG MAXIMUS X HERO to motherboard list

Signed-off-by: reis <4367558+reisholmes@users.noreply.github.com>

Author: reisholmes

README.md

@@ -31,6 +31,7 @@ the hwmon-next branch.
  * ROG CROSSHAIR VIII IMPACT
  * ROG CROSSHAIR X670E HERO
  * ROG CROSSHAIR X670E GENE
+ * ROG MAXIMUS X HERO
  * ROG MAXIMUS XI HERO
  * ROG MAXIMUS XI HERO (WI-FI)
  * ROG MAXIMUS Z690 FORMULA