fix docs compile error
fix docs compile error

guycalledfrank/engine,aidinabedi/playcanvas-engine,H1Gdev/engine,sereepap2029/playcanvas,guycalledfrank/engine,playcanvas/engine,aidinabedi/playcanvas-engine,MicroWorldwide/PlayCanvas,MicroWorldwide/PlayCanvas,playcanvas/engine,sereepap2029/playcanvas,H1Gdev/engine,sereepap2029/playcanvas