community: Assess latest version of Covenant Code of Conduct

In updating our website, I have discovered the [Contributor Covenant Code of Conduct](https://www.contributor-covenant.org/) has had a major release and significant changes since we adopted it back in 2019 or so. See latest version (2.1 as opposed to our 1.4) here: https://www.contributor-covenant.org/version/2/1/code_of_conduct/code_of_conduct.md

- let's set time aside to look at the differences
- let's assess if we want to update our existing code of conduct