docs: add changelog entry for clickhouse fix

changes/ee/fix-10270.en.md

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+Clickhouse has got a fix that makes the error message better when users click the test button in the settings dialog.

changes/ee/fix-10270.zh.md

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+Clickhouse 已经修复了一个问题，当用户在设置对话框中点击测试按钮时，错误信息会更清晰。