message: include email as prop of `email_submitted` call in email widget component
diff: email_untrusted: formData.email.value,
  });
  - await trackEvent("email_submitted", {});
  + await trackEvent("email_submitted", {
  + email: formData.email.value,
  + });
  const response = await fetch("/api/signup", {
  method: "post",
  