Docs: Update usage example.
Docs: Update usage example.

francisleunggie/openface,nmabhi/Webface,Alexx-G/openface,francisleunggie/openface,nmabhi/Webface,nhzandi/openface,cmusatyalab/openface,cmusatyalab/openface,nmabhi/Webface,cmusatyalab/openface,xinfang/face-recognize,nhzandi/openface,xinfang/face-recognize,francisleunggie/openface,Alexx-G/openface,Alexx-G/openface,nhzandi/openface,nmabhi/Webface,xinfang/face-recognize,Alexx-G/openface