Update USAGE.md

USAGE.md

@@ -367,7 +367,7 @@ _Note:_ Button combos that interfere with menu navigation for commands that aren
 menuing are disabled while the utility menu is active.
 
 ### Issues
-There some known issues with the Wii VC version of gz;
+There are some known issues with the Wii VC version of gz;
 - The L button on the Classic Controller is mapped to Z on the Virtual Console, and L on the Virtual Console is left unmapped.
 The WAD patcher remaps C-Down on the Classic Controller to L on the Virtual Console to provide access to the utility menu.
 - Disk features rely on the presence of the ED64 which does not exist on the Wii, and are therefore unavailable.