Update the priority class docs to add the built in priority classes

[vaibhav2107]

Description

Issue

Closes: #39000

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[vaibhav2107]

/cc @sftim
Could you please have a look

[sftim]

/uncc

I'm happy for anyone to review this PR.

[vaibhav2107]

Hi @davidopp @piosz
Could you please have a look

[piosz]

@vaibhav2107 I'm not longer active in the community. Not sure about @davidopp

@aojea @wojtek-t would you be able to help redirecting accordingly?

[sftim]

@kubernetes/sig-node-pr-reviews do you want to review here?

[k8s-triage-robot]

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/lifecycle stale

[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all PRs.

This bot triages PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the PR is closed

You can:

• Mark this PR as fresh with /remove-lifecycle rotten
• Close this PR with /close
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/lifecycle rotten

[jayeshmahajan]

looks good to me

[k8s-ci-robot]

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