Draft: Added in various missing alternative mobs to slayer tasks.
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What have you done in this MR?
Added in more alternative enemies for slayer tasks. Removed non-combat NPCs from lists. Fixed some spelling errors in the file.
https://runescape.wiki/w/Slayer_substitutes?direction=prev&oldid=2137247
Are there any tricky things testers should keep an eye out for?
Not really anything to test.
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