Fix screenreader label of search icon

Signed-off-by: Jan C. Borchardt <hey@jancborchardt.net>

core/src/views/UnifiedSearch.vue

@@ -28,7 +28,10 @@
 		@close="onClose">
 		<!-- Header icon -->
 		<template #trigger>
-			<Magnify class="unified-search__trigger" :size="20" fill-color="var(--color-primary-text)" />
+			<Magnify class="unified-search__trigger"
+				:size="20"
+				:title="ariaLabel"
+				fill-color="var(--color-primary-text)" />
 		</template>
 
 		<!-- Search form & filters wrapper -->
@@ -191,6 +194,10 @@ export default {
 			}, {})
 		},
 
+		ariaLabel() {
+			return t('core', 'Search')
+		},
+
 		/**
 		 * Is there any result to display
 		 * @returns {boolean}