Minor formatting issue.

Author: toddbirchard

flask_blueprint_tutorial/static/src/less/nav.less

@@ -12,7 +12,7 @@ nav {
     display: flex;
     justify-content: space-between;
     align-items: center;
-    margin: 0 !important;
+    margin: 0 auto !important;
 
     .left-nav {
       display: flex;