Fix tip on JSON key value pairs

cms/templates/settings_advanced.html

@@ -58,7 +58,7 @@ editor.render();
         <section class="group-settings advanced-policies">
           <header>
             <h2 class="title-2">Manual Policy Definition</h2>
-            <span class="tip">Manually Edit Course Policy Values (JSON Key and Pair values)</span>
+            <span class="tip">Manually Edit Course Policy Values (JSON Key / Value pairs)</span>
           </header>
 
           <p class="instructions"><strong>Warning</strong>: Add only manual policy data that you are familiar