Fixes broken modal for security reports after BS4 upgrade

ee/app/assets/javascripts/vue_shared/security_reports/components/modal.vue

@@ -163,7 +163,7 @@ export default {
       </div>
 
       <div class="row prepend-top-20 append-bottom-10">
-        <div class="col-sm-10 col-sm-offset-2 text-secondary">
+        <div class="col-sm-10 offset-sm-2 text-secondary">
           <template v-if="hasDismissedBy">
             {{ s__('ciReport|Dismissed by') }}
             <a

ee/app/assets/stylesheets/pages/security_reports.scss

@@ -125,6 +125,7 @@
 .modal-security-report-dast {
   .modal-dialog {
     width: $modal-lg;
+    max-width: $modal-lg;
   }
   // TODO remove this when gl_modal support not rendering the footer
   .modal-footer {