Requesting Artist Tag Fix

BUR #8201 has been approved by @evazion.

category hoshi_akari -> artist

This artist tag was caught in the proverbial crossfire when hoshi_akari_(ixquic) was updated, it seems.

I changed it manually.

BUR #8203 has been approved by @nonamethanks.

category minazuki_haruka -> artist

This is another artist tag that was changed to character at some point, apparently after conflicting with minazuki_haruka_(twin_angel).

The bulk update request #8203 (forum #201983) has been approved by @nonamethanks.

The bulk update request #8201 (forum #201980) has been approved by @evazion.