Update Facebook.php
Update Facebook.php

Missing namespace Embed\Utils
thenextweb/Embed,RJacksonm1/Embed,davereid/Embed,zyuhel/Embed,Soullivaneuh/Embed,JanPetterMG/Embed,daveross/Embed,younes0/Embed,oscarotero/Embed,mburtscher/Embed