Add @kingdonb to fluxcd/flux maintainers

[kingdonb]

In conversations with @alisondy and @staceypotter in the past week, it came up that though I have worked on Flux for some time, I do not yet have a Project Maintainer status in the FluxCD org. They both suggested that it would make sense for me to be formally considered as a maintainer for Flux.

I have been working on Flux for some time now; I have previously asked for and received write access to the Flux repo, and I have been very happy to be working on Flux releases since about February. I think it makes sense to ask for this status now.

Please consider granting me the Project Maintainer role in the fluxcd/flux repo.

From the process guide in the Community Roles document, these are the steps: https://github.com/fluxcd/community/blob/main/community-roles.md#maintainer

• Make a PR against the MAINTAINERS file for a fluxcd GitHub org repo (this PR)
• @-at-mention all the other current maintainers (@stefanprodan, @hiddeco and @squaremo)
• Have maintainers submit their vote by +1
• Once all maintainers in repo have +1 the pr will be reviewed by a member of the Flux Oversight Committee

For your consideration! Thank you, Kingdon Barrett

[squaremo]

You have certainly been doing what's expected of a maintainer, and led by example in the community. +1