Fix Director links: Restore LinkedIn icon and add GitHub link

Author: rkn2

index.html

@@ -425,8 +425,9 @@ <h3>Rebecca Napolitano, PhD</h3>
                             <a href="mailto:nap@psu.edu" class="person-link" title="Email">✉️</a>
                             <a href="https://scholar.google.com/citations?user=DB5ejLoAAAAJ&hl=en" target="_blank"
                                 class="person-link" title="Google Scholar">🎓</a>
+                            <a href="https://github.com/rkn2" target="_blank" class="person-link" title="GitHub">💻</a>
                             <a href="https://www.linkedin.com/in/rebeccanapolitano/" target="_blank" class="person-link"
-                                title="LinkedIn">�</a>
+                                title="LinkedIn">💼</a>
                         </div>
                     </div>
                 </div>