Fix WZ_HEAVENDRIVE skill ratio (#4862)

* Adjusted to account for the default 100.
Thanks to @Latiosu!

src/map/battle.cpp

@@ -6240,7 +6240,7 @@ struct Damage battle_calc_magic_attack(struct block_list *src,struct block_list
 						break;
 #ifdef RENEWAL
 					case WZ_HEAVENDRIVE:
-						skillratio += 125;
+						skillratio += 25;
 						break;
 					case WZ_METEOR:
 						skillratio += 25;