Docs

[nckturner]

What type of PR is this?

Uncomment only one, leave it on its own line:

/kind documentation

What this PR does / why we need it:

• Update changelog.py to support PRs without merge commits
• Add v1.22.0 to CHANGELOG.md

Does this PR introduce a user-facing change?:

NONE

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[wongma7]

could we make master branch source of truth for CHANGELOGs? how k/k does it is they have master branch changelogs https://github.com/kubernetes/kubernetes/tree/master/CHANGELOG and then a bot updates the per-branch changelogs https://github.com/kubernetes/kubernetes/blob/release-1.22/CHANGELOG/CHANGELOG-1.22.md

We don't have a bot but I don't think it is super necessary to have useful per-branch changelogs anyway

[wongma7]

/lgtm

[wongma7]

Wait no, this PR is already targeting master branch so yes master branch is already source of truth. MY B ignore prev comment -_-

[wongma7]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: nckturner, wongma7

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[nckturner]

could we make master branch source of truth for CHANGELOGs?

That's what I was doing, what do you mean?