chequeo de acceso al objeto navigator agregado para evitar errores en el SSR

Author: santiortizrv

src/components/videoBackground/VideoBackground.js

@@ -5,6 +5,7 @@ import PropTypes from "prop-types"
 import { GatsbyImage, getImage } from "gatsby-plugin-image"
 
 function getIOSVersion() {
+  if (typeof window === "undefined" || typeof navigator === "undefined") { return null; }
   const userAgent = navigator.userAgent;
 
   // Check if it's an iOS device