Update _navigation.less

Author: Karlasa

app/design/frontend/Magento/blank/web/css/source/_navigation.less

@@ -93,7 +93,7 @@
         .switcher {
             border-top: 1px solid @color-gray82;
             font-size: 1.6rem;
-            font-weight: 700;
+            font-weight: @font-weight__bold;
             margin: 0;
             padding: .8rem 3.5rem .8rem 2rem;
 
@@ -147,7 +147,7 @@
 
                 &.greet.welcome {
                     border-top: 1px solid @color-gray82;
-                    font-weight: 700;
+                    font-weight: @font-weight__bold;
                     padding: .8rem @indent__base;
                 }
 
@@ -161,7 +161,7 @@
                 .lib-css(color, @navigation-level0-item__color);
                 .lib-css(text-decoration, @navigation-level0-item__text-decoration);
                 display: block;
-                font-weight: 700;
+                font-weight: @font-weight__bold;
                 padding: .8rem @indent__base;
             }