[DOCS] Make anim API private (#1924)
[DOCS] Make anim API private (#1924)

Co-authored-by: Donovan Hutchence <206e9a39e6db29de606a97e8caefd40a0b429916@snapchat.com>
sereepap2029/playcanvas,sereepap2029/playcanvas,MicroWorldwide/PlayCanvas,sereepap2029/playcanvas,playcanvas/engine,aidinabedi/playcanvas-engine,MicroWorldwide/PlayCanvas,playcanvas/engine,aidinabedi/playcanvas-engine