rename close quarters combat -> close-quarters combat

BUR #33699 is pending approval.

rename close_quarters_combat -> close-quarters_combat

Matches intuition and the Wikipedia articles' intro: https://ja.wikipedia.org/wiki/近接戦闘, https://en.wikipedia.org/wiki/Close-quarters_battle

/cqc will still work after this change

It doesn't really matter in practice for autocomplete, but why the rename instead of just alias?

Not a lot of posts yet, so I figure it won't affect anyone's workflow, but admin can change it on approval at their discretion