fix learn more for new chart (#2390)

Author: mikehelmick

assets/server/realmadmin/_stats_codes.html

@@ -202,7 +202,7 @@ <h5 class="modal-title">User report codes &amp; usage</h5>
   </div>
 </div>
 
-<div class="modal fade" id="realm-user-codes-modal" data-backdrop="static" tabindex="-1">
+<div class="modal fade" id="realm-user-codes-mismatch-modal" data-backdrop="static" tabindex="-1">
   <div class="modal-dialog modal-dialog-centered">
     <div class="modal-content">
       <div class="modal-header">