Update index.html

Author: AlserLab

teaching/index.html

@@ -61,7 +61,7 @@
                         <span class="icon-bar middle-bar"></span>
                         <span class="icon-bar bottom-bar"></span>
                     </button>
-                    
+                
                     <div class="collapse navbar-collapse text-right" id="navbarNav">
                         <ul class="navbar-nav ml-auto flex-nowrap">
                             <!-- About -->