magipoka uma -> yuuma alias

BUR #28368 has been approved by @nonamethanks.

create alias uma_(renkin_san-kyuu_magical_pokaan) -> yuuma_(renkin_san-kyuu_magical_pokaan)

Uma is a common name for her, she is Uma on MAL, on ANN, and on danbooru too. (aniDB uses Yuuma, and her name, ゆうま sounds as "Yuuma")

She went uma -> yuuma in topic #14740, but I think Uma is very common name for her (probably more common), and it would worth an alias

The bulk update request #28368 (forum #292046) has been approved by @nonamethanks.