fix(DB/loot): Adjust Nightbane Dark Runner loot (#5966)

A reference table (id: 24042) containing level 40 items was included
in Nightbane Dark Runner's (id: 205) (level 28-29) loot table. This
seems wrong and it *is* wrong according to wowhead classic, so I removed
the reference.

- Closes #5965
- Closes https://github.com/chromiecraft/chromiecraft/issues/675

data/sql/updates/pending_db_world/rev_1621508254911888350.sql

@@ -0,0 +1,3 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1621508254911888350');
+
+DELETE FROM `creature_loot_template` WHERE `Entry` = 205 AND `Reference` = 24042;