udpate navbar height variables

Author: javiert-okta

src/libs/theme/styles/_variables.scss

@@ -150,8 +150,8 @@ $gradient-app-card---resting: linear-gradient(
 
 $ribbon-height: 2rem;
 $ribbon-height-mobile: 2rem;
-$navbar-height: 5rem;
-$navbar-height-mobile: 3rem;
+$navbar-height: 6rem;
+$navbar-height-mobile: 4.5rem;
 $main-nav-height: calc($ribbon-height + $navbar-height);
 $main-nav-height-mobile: calc($ribbon-height-mobile + $navbar-height-mobile);