docs: move v0.19.3 items to correct file

[guggero]

Moves the PRs that are going to be shipped with v0.19.3 into the correct release notes file.

See #10134 for more details.

[gemini-code-assist]

Summary of Changes

Hello @guggero, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a documentation discrepancy by re-categorizing specific release notes entries. The intent is to ensure that the v0.19.3 release notes accurately reflect the changes shipped with that version, by moving relevant items from the v0.20.0 notes and updating the contributor list.

Highlights

• Release Notes Reorganization: This pull request primarily focuses on correcting the placement of release notes entries. Several bug fixes and a functional enhancement that were previously listed under the v0.20.0 release notes have been accurately moved to the v0.19.3 release notes, ensuring that the documentation reflects the correct versioning for these changes.
• Contributor Acknowledgment: The contributor list for the v0.19.3 release notes has been updated to include 'Elle Mouton', acknowledging their contributions to the project.

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[gemini-code-assist]

Code Review

This pull request moves release note items for v0.19.3 to the appropriate file. The review includes suggestions to improve consistency and correct a grammatical error in the release notes.

[yyforyongyu]

🙏