Update GitHub link

Author: tobloef

index.html

@@ -95,7 +95,7 @@
 				<a href="https://twitter.com/TobLoef" class="navbar-item navbar-icon">
 					<i class="fab fa-twitter"></i>
 				</a>
-				<a href="https://github.com/TobLoef" class="navbar-item navbar-icon">
+				<a href="https://github.com/TobLoef/text2mindmap" class="navbar-item navbar-icon">
 					<i class="fab fa-github"></i>
 				</a>
 			</ul>