fix: name the Folder modal close button (WCAG 4.1.2) (#29160)

src/lib/components/layout/Sidebar/Folders/FolderModal.svelte

@@ -119,6 +119,7 @@
 				{/if}
 			</div>
 			<button
+				aria-label={$i18n.t('Close')}
 				class="self-center rounded-lg p-1 text-gray-500 transition hover:bg-gray-50 hover:text-gray-700 dark:text-gray-400 dark:hover:bg-gray-800 dark:hover:text-gray-200"
 				on:click={() => {
 					show = false;