Scripts/Item: Change Nitro -> Boosts <- to use the correct knockup effect for their backfire. Also, script that knockup effect to work properly ("usually" deploy a rescue parachute).

sql/updates/world/3.3.5/2017_07_18_03_world.sql

@@ -0,0 +1,3 @@
+--
+DELETE FROM `spell_script_names` WHERE `scriptname`='spell_item_nitro_boosts_backfire';
+INSERT INTO `spell_script_names` (`spell_id`,`scriptname`) VALUES (54621,'spell_item_nitro_boosts_backfire');