Fix translation string (#14986)

app/javascript/mastodon/locales/en.json

@@ -334,7 +334,7 @@
   "notifications.filter.statuses": "Updates from people you follow",
   "notifications.group": "{count} notifications",
   "notifications.mark_as_read": "Mark every notification as read",
-  "notifications.permission_denied": "Cannot enable desktop notifications as permission has been denied.",
+  "notifications.permission_denied": "Desktop notifications are unavailable due to previously denied browser permissions request",
   "notifications.permission_denied_alert": "Desktop notifications can't be enabled, as browser permission has been denied before",
   "notifications_permission_banner.enable": "Enable desktop notifications",
   "notifications_permission_banner.how_to_control": "To receive notifications when Mastodon isn't open, enable desktop notifications. You can control precisely which types of interactions generate desktop notifications through the {icon} button above once they're enabled.",