chore: update visual previews

Author: kendo-bot

tests/_output/bootstrap/filemanager/filemanager-contextmenu.png

@@ -163,7 +163,7 @@
         <div class="k-animation-container k-animation-container-shown">
             <div class="k-child-animation-container">
                 <div id="filemanager-context-menu" class="k-menu-popup k-context-menu-popup k-popup">
-                    <ul class="k-menu-group k-menu-group-md">
+                    <ul class="k-context-menu k-menu-group k-menu-group-md">
                         <li class="k-menu-item k-item">
                             <span class="k-link k-menu-link">
                                 <span class="k-menu-link-icon k-icon k-svg-icon k-svg-i-pencil">