Tag Alias: yumeutarium -> amamiya_mizuoto

Aliasing yumeutarium -> amamiya_mizuoto.

Reason: site name -> artist name

I'm not certain if Amamiya Mizuoto is the correct reading of 雨宮水音 though. If the correct reading can't be determined then the alias can go the other way too.

Blog (and pixiv) gives the reading for the given name:

管理人:雨宮水音（みなと）

And I guess Amamiya is as good as anything else for the family name. So I aliased it to amamiya_minato.