AMBARI-4665. Update Ambari API docs to add Config Groups and Request Scehdule resources. Fix. (swagle)

ambari-server/docs/api/v1/request-schedules.md

@@ -146,9 +146,9 @@ The schedule is a Quartz scheduler cron expression minus the seconds specifier.
 
 <table>
   <tr>
-    <td>Field</td>
-    <td>Allowed values</td>
-    <td>Allowed special characters</td>
+    <th>Field</th>
+    <th>Allowed values</th>
+    <th>Allowed special characters</th>
   </tr>
   <tr>
     <td>Minutes</td>