📖 Improve release notes with additional information

[furkatgofurov7]

What this PR does / why we need it:

1. Fixes indentation for auto generated index update PR
2. Improves release notes with missing notes and information for easier following

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please ask for approval from furkatgofurov7. For more information see the Kubernetes Code Review Process.

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

Needs approval from an approver in each of these files:

• OWNERS

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-cluster-api-operator ready!

Name	Link
🔨 Latest commit	2f886a1
🔍 Latest deploy log	https://app.netlify.com/sites/kubernetes-sigs-cluster-api-operator/deploys/6706daf6aa82550008e20aa4
😎 Deploy Preview	https://deploy-preview-622--kubernetes-sigs-cluster-api-operator.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.