Alias Tanuki (Umamusume) -> Umamusume Tanuki

The bulk update request #12036 has been rejected.

create alias tanuki_(umamusume) -> umamusume_tanuki

I didn't know the latter tag existed. Might as well alias the former as an utility alias.

The bulk update request #12036 (forum #220316) has been rejected by @evazion.

The bulk update request #12103 has been approved by @evazion.

rename tanuki_(umamusume) -> umamusume_tanuki

I'll do this as a rename since with the new autocomplete a utility alias is unnecessary.

The bulk update request #12103 (forum #220595) has been approved by @evazion.