Add Scribbler link to tutorials section in index.html

Author: nikoscham

index.html

@@ -566,6 +566,14 @@ <h2 id="tutorials"><a name="Tutorials"></a>Tutorials</h2>
             alt="External Link Icon"
             style="width: 16px; height: 16px; vertical-align: middle; margin-left: 2px; margin-bottom: 4px"
         /></a>
+        <a
+          href="https://app.scribbler.live/?jsnb=github:nikoscham/FEAScript-Scribbler-examples/generalFormPDEScript/advection-diffusion-1d.jsnb"
+          class="badge badge-scribbler"
+          >Scribbler<img
+            src="https://upload.wikimedia.org/wikipedia/commons/4/44/Icon_External_Link.svg"
+            alt="External Link Icon"
+            style="width: 16px; height: 16px; vertical-align: middle; margin-left: 2px; margin-bottom: 4px"
+        /></a>
       </li>
       <li>
         <span class="tutorial-name">Heat Conduction in a 2D Fin</span>