Koipapa character tags update

BUR #6394 has been rejected.

mass update karen_(koisuru_ojou-sama_wa_papa_to_yobitakunai) -> sakaki_karen
mass update yashiro_masamune -> yahiro_masamune

Karen's full name has now been given. Masamune's original tag has a typo.

You need to use a rename or an alias, not a mass update.

The bulk update request #6394 (forum #192286) has been rejected by @evazion.

BUR #6426 has been approved by @evazion.

create alias karen_(koisuru_ojou-sama_wa_papa_to_yobitakunai) -> sakaki_karen
create alias yashiro_masamune -> yahiro_masamune

As above.

The bulk update request #6426 (forum #192453) has been approved by @evazion.