fixes twbs#5496: use correct var for dropdown active link text

Author: mdo

docs/assets/css/bootstrap.css

@@ -2835,7 +2835,7 @@ table th[class*="span"],
 
 .dropdown-menu .active > a,
 .dropdown-menu .active > a:hover {
-  color: #ffffff;
+  color: #333333;
   text-decoration: none;
   background-color: #0081c2;
   background-image: -moz-linear-gradient(top, #0088cc, #0077b3);

less/dropdowns.less

@@ -97,7 +97,7 @@
 // ------------
 .dropdown-menu .active > a,
 .dropdown-menu .active > a:hover {
-  color: @dropdownLinkColorHover;
+  color: @dropdownLinkColorActive;
   text-decoration: none;
   outline: 0;
   #gradient > .vertical(@dropdownLinkBackgroundActive, darken(@dropdownLinkBackgroundActive, 5%));