Use the correct data attributes for the dialog to close

Author: jcoyne

app/components/blacklight_modal_component.html.erb

@@ -1,6 +1,6 @@
 <div class="modal-header">
   <h3 class="modal-title"><%= header %></h3>
-  <button type='button' class='btn-close' data-bs-dismiss='modal' aria-hidden='true'></button>
+  <button type='button' class='btn-close' data-bl-dismiss='modal' aria-hidden='true'></button>
 </div>
 
 <div class="modal-body">
@@ -9,5 +9,5 @@
 
 <div class="modal-footer">
   <%= footer %>
-  <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
+  <button type="button" class="btn btn-secondary" data-bl-dismiss="modal">Cancel</button>
 </div>