Add link around QR code

Author: stefmolin

slides/html/workshop.slides.html

@@ -128463,7 +128463,7 @@ <h1 id="Related-content">Related content<a class="anchor-link" href="#Related-co
 <h1 id="Thank-you!">Thank you!<a class="anchor-link" href="#Thank-you!">&#182;</a></h1><p><em>I hope you enjoyed the session. You can follow my work on these platforms:</em></p>
 <div style="display: flex; justify-content: space-between; align-items: center;">
     <div style="text-align: center; flex-basis: auto; flex-shrink: 2;">
-      <a href="https://stefaniemolin.com/feedback" target="_blank"></a>
+      <a href="https://stefaniemolin.com/feedback" target="_blank">
         <img
           width="20%"
           alt="Please visit https://stefaniemolin.com/feedback to provide your feedback on this session."