Update CHANGELOG for release v3.8.3-patch.16

[github-actions]

This PR updates the CHANGELOG files for release v3.8.3-patch.16

[withchao]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Merged origin/main into this branch and resolved the conflict in CHANGELOG/CHANGELOG-3.8.md — keeping the v3.8.3-patch.16 entries from this branch and adding the v3.8.3-patch.12, v3.8.3-patch.9, v3.8.3-patch.8, and v3.8.3-patch.7 entries from main. Commit: 974400e5.

[github-actions]

💕 Thank you for your contribution and please kindly read and sign our CLA. CLA Docs

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I have read the CLA Document and I hereby sign the CLA

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1 out of 2 committers have signed the CLA.
✅ (dsx137)[https://github.com/dsx137]
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