Low-cut, Low neckline

BUR #49624 has been rejected.

create alias low-cut -> low_neckline

I always thought these two tags are too similar and overlap with each other too much

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 #49624 (forum #394429) has been rejected by @DanbooruBot.