more calming fireflies

Minecraft 版本： 1.21.7 1.21.8

平台： minecraft

标签： audio simplistic vanilla-like

I find the sound of fireflies really grating so I replaced it with a different Night Ambience sound.

Initially made for Java snapshot 25w32a, should support every snapshot/version for a long time.

Currently supports pack_format values 65.1 to 900 (900 is an arbitrary number, but it should keep this pack from breaking for a long time).