rename yakuru -> yakkuru + Eng alias

BUR #18239 has been rejected.

rename yakuru -> yakkuru
create alias yakul -> yakkuru

The Japanese is ヤックル Yakkuru, with a doubled k. Yakul is the official English spelling. https://ghibli.fandom.com/wiki/Yakul

We should use Yakul as main tag then.

BUR #18394 has been approved by @nonamethanks.

rename yakuru -> yakul
create alias yakkuru -> yakul

nonamethanks said:

We should use Yakul as main tag then.

Makes sense. Here's that one.

The bulk update request #18394 (forum #248113) has been approved by @nonamethanks.

The bulk update request #18239 (forum #247418) has been rejected by @nonamethanks.