Errata: Debian version inconsistency for molecule image

In the section "Adjusting Molecule to use more flexible test containers"

> The last step is to make sure the playbook also runs correctly on Debian-based systems. Since there exists a `geerlingguy/docker-debian10-ansible` container (see a full list of the Docker Ansible test containers I maintain), you can run the Molecule tests under that operating system as well:
> ```
> $ MOLECULE_DISTRO=debian12 molecule test”
> ...
> ```

You mention a container for debian10 but use debian12 in the example.

Find the section titled "Adjusting Molecule to use more flexible test containers" in the documentation and compare the Debian container name with the MOLECULE_DISTRO example. Make the Debian version references consistent, then verify the surrounding code block still reads correctly.

Written by the indexing model from the issue text.