Fixed typo in Responsive Tables CSS docs

docs/_includes/css/tables.html

@@ -348,7 +348,7 @@
 
 
   <h2 id="tables-responsive">Responsive tables</h2>
-  <p>Create responsive tables by wrapping any <code>.table</code> in <code>.table-responsive</code> to make them scroll horizontally up to small devices (under 768px). When viewing on anything larger than 768px wide, you will not see any difference in these tables.</p>
+  <p>Create responsive tables by wrapping any <code>.table</code> in <code>.table-responsive</code> to make them scroll horizontally on small devices (under 768px). When viewing on anything larger than 768px wide, you will not see any difference in these tables.</p>
   <div class="bs-example">
     <div class="table-responsive">
       <table class="table">