Made UMU_NO_RUNTIME more visible

Author: Shendisx

src/content/docs/configuration/gaming.mdx

@@ -199,6 +199,8 @@ If you encounter issues with games using **Easy Anti-Cheat** (EAC) or **BattlEye
 :::note
 Make sure you have umu-launcher from CachyOS installed in your system. Install it with the following command:
 `sudo pacman -S cachyos/umu-launcher`
+
+Do not forget to include the `UMU_NO_RUNTIME` environment variable
 :::
 
 <Tabs>