[release] Add v5.3.0 changelog and bump version to v5.3.1 - #11795

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Rbb666 merged 2 commits into

RT-Thread:masterfrom

CYFS3:release/v5.3.0-changelog-v5.3.1

Sep 10, 2026

Commits on Sep 10, 2026

[docs] Add v5.3.0 changelog
CYFS3
committed
1446420
[kernel] Bump version to v5.3.1
CYFS3
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300bc20