Update CRD API reference for Kubernetes 1.22

[roberthbailey]

What type of PR is this?

Uncomment only one /kind <> line, press enter to put that in a new line, and remove leading whitespace from that line:

/kind breaking
/kind bug
/kind cleanup

/kind documentation

/kind feature
/kind hotfix

What this PR does / Why we need it: I manually edited crd-doc-config.json to point docs to the new k8s version and then ran make gen-crd-client and make gen-api-docs.

Which issue(s) this PR fixes:

Work on #2494

Special notes for your reviewer:

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: pooneh-m, roberthbailey

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• OWNERS [pooneh-m,roberthbailey]

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[agones-bot]

Build Succeeded 👏

Build Id: 70105bc5-7b7e-49b2-961c-02567df2bdc3

The following development artifacts have been built, and will exist for the next 30 days:

• image: gcr.io/agones-images/agones-controller:1.23.0-4f9195e
• image: gcr.io/agones-images/agones-ping:1.23.0-4f9195e
• Linux C++ SDK (build): agonessdk-1.23.0-4f9195e-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.23.0-4f9195e.zip

A preview of the website (the last 30 builds are retained):

• https://4f9195e-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/2560/head:pr_2560 && git checkout pr_2560
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.23.0-4f9195e