Use i18n for aria labels

app/assets/javascripts/snippets/components/snippet_blob_view.vue

@@ -90,7 +90,7 @@ export default {
 };
 </script>
 <template>
-  <figure class="file-holder snippet-file-content" :aria-label="__(`Code snippet`)">
+  <figure class="file-holder snippet-file-content" :aria-label="__('Code snippet')">
     <blob-header
       :blob="blob"
       :active-viewer-type="viewer.type"

app/views/shared/snippets/_embed.html.haml

@@ -17,5 +17,5 @@
         = embedded_raw_snippet_button(@snippet, blob)
 
         = embedded_snippet_download_button(@snippet, blob)
-  %figure.file-holder.snippet-file-content{ "aria-label" => "Code snippet" }
+  %figure.file-holder.snippet-file-content{ "aria-label" => _('Code snippet') }
     = render 'projects/blob/viewer', viewer: blob.simple_viewer, load_async: false, external_embed: true