MIME type `audio/aac` prefers extension `adts` over `aac`

[ksinder]

Using v2.1.35, the result of mime.extension("audio/aac") returns "aac".

Using v3.0.1, the result of mime.extension("audio/aac") returns "adts".

Is this expected? From https://mimetype.io/audio/aac it looks like maybe not, but wanted to double-check.