[docs] remove extraneous floating period from entity docs
[docs] remove extraneous floating period from entity docs

jaxmolina/ar,ngokevin/aframe,dmarcos/aframe,ngokevin/aframe,wizgrav/aframe,RSpace/aframe,mkungla/aframe,jaxmolina/ar,weddingdj/aframe,chenzlabs/aframe,weddingdj/aframe,chenzlabs/aframe,mkungla/aframe,googlecreativelab/aframe,googlecreativelab/aframe,aframevr/aframe,wizgrav/aframe,aframevr/aframe,RSpace/aframe,darkwing/aframe,darkwing/aframe,dmarcos/aframe