Fix image icon

Author: DanielChaseButterfield

docs/index.html

@@ -157,11 +157,11 @@ <h1 class="title is-1 publication-title">MI-HGNN: Morphology-Informed Heterogene
                   <a href="https://github.com/lunarlab-gatech/Morphology-Informed-HGNN/blob/main/paper/website_images/poster.png" target="_blank"
                   class="external-link button is-normal is-rounded is-dark">
                   <span class="icon">
-                    <i class="fa-solid fa-image"></i>
+                    <i class="fas fa-image"></i>
                   </span>
                   <span>Poster</span>
-                </a>
-              </span>
+                  </a>
+                </span>
             </div>
           </div>
         </div>