Add `JsonIgnore` rule for `StoryboardFile`
Add `JsonIgnore` rule for `StoryboardFile`

Not sure why this is required, doesn't make much sense.

smoogipooo/osu,peppy/osu,ppy/osu,peppy/osu,NeoAdonis/osu,smoogipoo/osu,NeoAdonis/osu,ppy/osu,NeoAdonis/osu,peppy/osu,peppy/osu-new,smoogipoo/osu,ppy/osu,smoogipoo/osu