Use SDL_EventType and fix event name in comment

include/SDL3/SDL_events.h

@@ -420,7 +420,7 @@ typedef struct SDL_JoyAxisEvent
  */
 typedef struct SDL_JoyBallEvent
 {
-    Uint32 type;        /**< ::SDL_JOYBALLMOTION */
+    SDL_EventType type; /**< ::SDL_EVENT_JOYSTICK_BALL_MOTION */
     Uint32 reserved;
     Uint64 timestamp;   /**< In nanoseconds, populated using SDL_GetTicksNS() */
     SDL_JoystickID which; /**< The joystick instance id */