[5.4] Move associations alert (#46011)

Author: brianteeman

build/media_source/com_associations/js/associations-edit.es6.js

@@ -23,7 +23,7 @@ Joomla = window.Joomla || {};
   };
 
   Joomla.showAssociationMessage = () => {
-    const associations = document.getElementById('associations');
+    const associations = document.getElementById('fieldset-associations');
 
     if (associations) {
       const html = document.createElement('joomla-alert');