Tutorial mistakes

Hey :). Don't know where else to post this so...

Found 2 mistakes in this tutorial:

https://docs.graphene-python.org/projects/django/en/latest/tutorial-plain/

Where it says: "Now sync your database for the first time:"
There is no manage.py in that directory. One must go back one directory. So, `cd ..` first, and then execute the `python manage.py` migrate command.

Where it says: "Don’t forget to create & run migrations:"
This will fail because in `class IngredientsConfig(AppConfig): ` we have `name = 'ingredients'`. The name is wrong. It should be `name = 'cookbook.ingredients'`

Start with the tutorial at docs.graphene-python.org/projects/django/en/latest/tutorial-plain/ and locate its source in the repository. Verify the database migration command's directory and the IngredientsConfig name, then update the tutorial and confirm both steps work as documented.

索引モデルが issue の本文から書いたものです。