suggestion

还没有人认领这个 Issue。

is it mentioned in the doc that you don't need to close the connection when it is written in the form of `async with pool.acquire() as con:`

I know it is somehow obvious for python users.
but for newer python users i think it's not so clear.
even some python devs may use the `with` statement for the first time to make database access ,so they are not familiar with that convention .

该 payload 没有指明文档文件；请在文档中搜索 `async with pool.acquire() as con:` 以及连接管理方面的说明。更新解释，使新贡献者能够了解上下文管理器会处理释放操作，然后确认周围的数据库池示例仍然准确。

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