fix: show captcha when turnstile is enabled only

src/components/auth/register-form.tsx

@@ -230,10 +230,12 @@ export const RegisterForm = ({
           </div>
           <FormError message={error} />
           <FormSuccess message={success} />
+          {turnstileEnabled && (
             <Captcha
               onSuccess={(token) => form.setValue('captchaToken', token)}
               validationError={form.formState.errors.captchaToken?.message}
             />
+          )}
           <Button
             disabled={isPending || (turnstileEnabled && !captchaToken)}
             size="lg"