Update raylib.h (#2726)

src/raylib.h

@@ -663,7 +663,7 @@ typedef enum {
     MOUSE_BUTTON_MIDDLE  = 2,       // Mouse button middle (pressed wheel)
     MOUSE_BUTTON_SIDE    = 3,       // Mouse button side (advanced mouse device)
     MOUSE_BUTTON_EXTRA   = 4,       // Mouse button extra (advanced mouse device)
-    MOUSE_BUTTON_FORWARD = 5,       // Mouse button fordward (advanced mouse device)
+    MOUSE_BUTTON_FORWARD = 5,       // Mouse button forward (advanced mouse device)
     MOUSE_BUTTON_BACK    = 6,       // Mouse button back (advanced mouse device)
 } MouseButton;