chore: add changelog

changes/v5.0.17/fix-9875.en.md

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+Return `400` if a broken plugin package is uploaded from HTTP API. Also cleanup if plugin is not accepted.

changes/v5.0.17/fix-9875.zh.md

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+当通过 HTTP API 上传一个损坏的插件包时，返回 `400`，且删除该插件包。