[Issue #3] - Fixed small typo in .sass file

assets/styles/kourend.sass

@@ -75,10 +75,10 @@ table tr:nth-child(even)
 .card-5
   box-shadow: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22)
 
-.container{
+.container
   max-width: 1200px
 
-#main-nav{
+#main-nav
   position: fixed
   top: 0
   left: 0