Add missing CHANGELOG entries for #64067

[michalczaplinski]

The CHANGELOG.md updates in #64067 were incomplete. This PR adds more relevant information.

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

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Co-authored-by: michalczaplinski <[email protected]>
Co-authored-by: cbravobernal <[email protected]>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[github-actions]

Flaky tests detected in 867d705.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/11344543883
📝 Reported issues:

• [Flaky Test] Entering zoomed out mode zooms the canvas #66051 in /test/e2e/specs/site-editor/zoom-out.spec.js