fix page.live bug

Author: cz31

wagtail_form_plugins/plugins/templating/models.py

@@ -44,8 +44,9 @@ def format_submission(
     def get_form(self, *args, page: StreamFieldFormPage, user: User, **kwargs) -> BaseForm:
         """Get the generated form."""
         form = super().get_form(*args, page=page, user=user, **kwargs)
-        if not page.live:
+        if page.first_published_at is None:
             return form
+
         formatter = self.templating_formatter_class(form_page=page, user=user)
         for field_slug, field in form.fields.items():
             if field.initial: