Docs: updating Animation Baker page

[madjin]

According to this PR the animation baker switched from cbor to zbencode+zbdecode webaverse/app#2259

Current page: https://docs.webaverse.com/docs/engineering/app/animation-baker#baker

Animation Baker uses the CBOR.encode function to encode the animations.

Diff code snippet
https://github.com/webaverse/app/blob/c14b6755723cac02b065fdcd4cec4100e63c557c/animations-baker.js#L571

I'm still figuring out how to mod the animation system atm