fix: update CSS selector for hiding fake footer row in Vaadin 25

Close #172

Author: javier-godoy

src/main/resources/META-INF/frontend/fcGridHelper/vaadin-grid.css

@@ -2,7 +2,7 @@
  * #%L
  * Grid Helpers Add-on
  * %%
- * Copyright (C) 2022 - 2025 Flowing Code
+ * Copyright (C) 2022 - 2026 Flowing Code
  * %%
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -55,7 +55,7 @@ table[aria-multiselectable="true"] [part~="fcGh-noselect"][first-column] ::slott
   pointer-events: none;
 }
 
-:host([theme~="hide-first-footer"]) tfoot [part="row"]:first-child {
+:host([theme~="hide-first-footer"]) tfoot [part~="row"]:first-child {
     display: none;
 }