rename organs -> organs_(anatomy)

BUR #16822 has been rejected.

create alias organs -> organs_(anatomy)

so people don't somehow mistake this for multiple instances of the musical instrument

That seems like a very unlikely case.

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

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

The bulk update request #16822 (forum #241369) has been rejected by @DanbooruBot.