set correct GameStates

src/tracking/tracking.controller.ts

@@ -21,7 +21,7 @@ export class TrackingController {
   // :id is the id of the game
   @Post('location/:id')
   @Roles('soldier')
-  @GameStates('started')
+  @GameStates('STARTED')
   @UsePipes(new ValidationPipe())
   async trackLocation(
     @User('id') userId,