[Category] Recategorize "takuan" from an artist tag to a general tag

https://danbooru.donmai.us/posts?tags=takuan

I noticed that the single word "takuan" is for some reason categorized as an artist tag when it should be a general tag, as there's no artist going by exactly that name.

I fixed it by adding general: in front of the tag to turn it into a general tag again.