hot -> too_hot

The bulk update request #9834 has been rejected.

create alias hot -> too_hot

Remove ambiguity around "hot" tag.

I'm not 100% sold on this. There's some cases like in hot onsen where it's obvious that it's hot but the characters aren't "too hot". There's likely more hidden away in the tag.

This bulk update request is pending automatic rejection in 5 days.

We also have a cold tag with the same ambiguity.

This bulk update request has been rejected because it was not approved within 45 days.

The bulk update request #9834 (forum #210382) has been rejected by @DanbooruBot.

I'm not sure what ambiguity "too hot" removes.