Remove Neil Smith as Podman Container Tools Maintainer

[Luap99]

Based after podman-container-tools/community#7

Also update the maintainer file link to the new Maintainer list in our community repo.
https://github.com/podman-container-tools/community/blob/main/MAINTAINERS.md

Maintainers for the specific projects are still listed in each repo, i.e.
https://github.com/podman-container-tools/podman/blob/main/MAINTAINERS.md

Corresponding .project repo change:
podman-container-tools/.project#6

Checklist for maintainer updates

Note

Delete this template if you're not changing the CSV file

• You've provided a link to documentation where the project has approved the maintainer changes.
• The maintainer(s) also created or updated their LFX Individual Dashboard profile.
• You've sent an email with the list of email address(es) to cncf-maintainer-changes@cncf.io for invitations to Service Desk and mailing lists. You can just mark this complete if you are only removing people.
• Optional: You've also sent a PR with affiliation updates to cncf/gitdm.

[baude]

LGTM