fix(examples): fix breaking change upstream (#300)

* fix(examples): fix breaking change upstream

It now requires a siteURL to function (as there isn't a great way to make it optional).

* fix(gatsby-example): use https for site

Co-authored-by: nothingismagick <drthompsonsmagickindustries@gmail.com>

examples/react/gatsby-themed-site/gatsby-config.js

@@ -4,6 +4,7 @@ module.exports = {
     siteDescription: `This is a smoke test to see that a (themed) Gatsbyjs site will work within Tauri.`,
     siteAuthor: `Jacob Bolda`,
     siteContact: "https://twitter.com/jacobbolda",
+    siteURL: "https://www.tauri.studio",
     contactLinks: [
       {
         url: "https://twitter.com/jacobbolda",