Fixed #23899 -- Added 'Generated by Django X.Y' to startproject template.

django/conf/project_template/project_name/settings.py

 """
 Django settings for {{ project_name }} project.
 
+Generated by 'django-admin startproject' using Django {{ django_version }}.
+
 For more information on this file, see
 https://docs.djangoproject.com/en/{{ docs_version }}/topics/settings/
 

django/core/management/templates.py

@@ -109,6 +109,7 @@ class TemplateCommand(BaseCommand):
             base_name: name,
             base_directory: top_dir,
             'docs_version': docs_version,
+            'django_version': django.__version__,
         }), autoescape=False)
 
         # Setup a stub settings environment for template rendering