Linting.

src/components/attachment/attachment.js

@@ -25,7 +25,7 @@ const Attachment = {
   },
   computed: {
     referrerpolicy () {
-      return this.$store.state.instance.mediaProxyAvailable ? "" : "no-referrer"
+      return this.$store.state.instance.mediaProxyAvailable ? '' : 'no-referrer'
     },
     type () {
       return fileTypeService.fileType(this.attachment.mimetype)