Make the formik example on the homepage an embed

Author: Ives van Hoorne

src/homepage/index.html

@@ -167,14 +167,14 @@ <h4>Made something cool? Send it to <a href="mailto:[email protected]">hello@
 
     <div class="picked-project">
       <h4>Formik Example by @jaredpalmer</h4>
-      <iframe src="https://codesandbox.io/s/zKrK5YLDZ" style="width:100%; height:500px; border:0; border-radius: 4px; overflow:hidden;"
+      <iframe src="https://codesandbox.io/embed/zKrK5YLDZ" style="width:100%; height:500px; border:0; border-radius: 4px; overflow:hidden;"
         sandbox="allow-modals allow-presentation allow-forms allow-popups allow-scripts allow-same-origin"></iframe>
     </div>
 
     <div class="picked-project">
       <h4>Redux-First Router by <span style="color: rgb(235, 78, 145)">@faceyspacey</span></h4>
-      <iframe src="https://codesandbox.io/embed/github/faceyspacey/redux-first-router-codesandbox?module=%2FroutesMap.js"
-        style="width:100%; height:500px; border:0; border-radius: 4px; overflow:hidden;" sandbox="allow-modals allow-presentation allow-forms allow-popups allow-scripts allow-same-origin"></iframe>
+      <iframe src="https://codesandbox.io/embed/github/faceyspacey/redux-first-router-codesandbox?module=%2FroutesMap.js" style="width:100%; height:500px; border:0; border-radius: 4px; overflow:hidden;"
+        sandbox="allow-modals allow-presentation allow-forms allow-popups allow-scripts allow-same-origin"></iframe>
     </div>
   </section>