Prepare release v0.6.3

[alculquicondor]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Which issue(s) this PR fixes:

Part of #2231

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alculquicondor

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [alculquicondor]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[netlify]

✅ Deploy Preview for kubernetes-sigs-kueue ready!

Name	Link
🔨 Latest commit	36c5cf9
🔍 Latest deploy log	https://app.netlify.com/sites/kubernetes-sigs-kueue/deploys/6655e9ea3910350008e60315
😎 Deploy Preview	https://deploy-preview-2292--kubernetes-sigs-kueue.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[mimowo]

/lgtm
/hold
in case we want to wait for #2196 according to #2231

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 2f4c78dc91de7aad7342ef69581fc0013a9833f6

[mimowo]

/hold
in case we want to wait for #2196 according to #2231

My mistake, #2196 is not on the waiting list.
/hold cancel