chore: update changes

changes/v5.0.16/fix-9824.en.md

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+The `topics/{topic}` API endpoint would return `500 - Internal Error` if a topic had multiple routes. This is fixed by returning a list of routes.

changes/v5.0.16/fix-9824.zh.md

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+修复：当存在多个路由信息时，topics/{topic} 将会返回 500 - Internal Error 的问题，现在将会正确的返回路由信息列表。