Fix 'volumes' argument type hint for 'run' and 'create' functions in containers.pyi

[smallSwed]

Instead of dict[str, str] | ... the volumes keyword argument accepts dict[str, dict[str, str]] | ... in ./docker/models/containers.pyi

see documentation: docker-py.readthedocs.io/en/stable/containers.html (at the moment version 7.1, but it is the same for older version too)

volumes (dict or list) –

A dictionary to configure volumes mounted inside the container. The key is either the host path or a volume name, and the value is a dictionary with the keys:

    bind The path to mount the volume inside the container

    mode Either rw to mount the volume read/write, or ro to mount it read-only.

For example:

{'/home/user1/': {'bind': '/mnt/vol2', 'mode': 'rw'},
 '/var/www': {'bind': '/mnt/vol1', 'mode': 'ro'}}

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉

[srittau]

Thanks!