Update index.html

Author: dgrammatiko

index.html

@@ -44,5 +44,8 @@ <h2>change the size passing the px to the width attribute</h2>
 
   <h2> Custom colors: using the host background-color and the ::part(canvas)</h2>
   <qr-element class="blue" input="https://dgrammatiko.dev"></qr-element>
+
+  <hr>
+  <a href="https://github.com/dgrammatiko/qr-element">Github repo</a>
 </body>
 </html>