Add aria label to close button

src/lib/components/chat/SettingsModal.svelte

@@ -541,6 +541,7 @@
 		<div class=" flex justify-between dark:text-gray-300 px-5 pt-4 pb-1">
 			<div class=" text-lg font-medium self-center">{$i18n.t('Settings')}</div>
 			<button
+				aria-label={$i18n.t('Close settings modal')}
 				class="self-center"
 				on:click={() => {
 					show = false;