added code block

Author: Nike353

index.html

@@ -101,6 +101,16 @@ <h1 class="title is-1 publication-title">Sampling-Based System Identification wi
                     <span>Video</span>
                   </a>
                 </span>
+                <!-- Code Link. -->
+                <span class="link-block">
+                  <a href="https://github.com/LeCAR-Lab/SPI-Active"
+                    class="external-link button is-normal is-rounded is-dark">
+                    <span class="icon">
+                      <i class="fab fa-github"></i>
+                    </span>
+                    <span>Code</span>
+                  </a>
+                </span>
               </div>
             </div>
           </div>