[BS5] change bootstrap general

data/web/templates/modals/quarantine.twig

@@ -2,8 +2,8 @@
   <div class="modal-dialog modal-lg">
     <div class="modal-content">
       <div class="modal-header">
-        <button type="button" class="close" data-bs-dismiss="modal"><span aria-hidden="true">×</span></button>
         <h3 class="modal-title"><i class="bi bi-info-circle-fill"></i> {{ lang.quarantine.qitem }}</h3>
+        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
       </div>
       <div class="modal-body">
         <div id="qid_error" style="display:none" class="alert alert-danger"></div>