Update docker collection to 2.1.1

[aknot242]

Updating docker collection to 2.1.1 for consistency and to address a breaking change for cases where version was < 1.9.

Proposed changes

Describe the use case and detail of the change. If this PR addresses an issue on GitHub, make sure to include a link to that issue using one of the supported keywords here in this description (not in the title of the PR).

Checklist

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• [ ] I have read the CONTRIBUTING document
• [ ] I have added Molecule tests that prove my fix is effective or that my feature works
• [ ] I have checked that any relevant Molecule tests pass after adding my changes
• [ ] I have updated any relevant documentation (defaults/main/*.yml, README.md and CHANGELOG.md)