[JSDoc] Fix in HighlightLayer documentation to say 'addMesh' instead of 'pushMesh'
[JSDoc] Fix in HighlightLayer documentation to say 'addMesh' instead of 'pushMesh'

jbousquie/Babylon.js,BabylonJS/Babylon.js,sebavan/Babylon.js,Kesshi/Babylon.js,NicolasBuecher/Babylon.js,sebavan/Babylon.js,BabylonJS/Babylon.js,NicolasBuecher/Babylon.js,Kesshi/Babylon.js,RaananW/Babylon.js,sebavan/Babylon.js,jbousquie/Babylon.js,BabylonJS/Babylon.js,RaananW/Babylon.js,RaananW/Babylon.js,NicolasBuecher/Babylon.js,Kesshi/Babylon.js,jbousquie/Babylon.js