alias audio_spectrum -> audio_visualizer

BUR #27591 has been approved by @nonamethanks.

create alias audio_spectrum -> audio_visualizer

Subset of a tag with under 100 posts. Probably doesn't need its own tag.

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 #27591 (forum #285867) has been rejected by @DanbooruBot.

The bulk update request #27591 (forum #285867) has been approved by @nonamethanks.