[Docathon][Remove File No.8]

[Wang-ZengWei]

将No.8docs/guides/06_distributed_training/cluster_quick_start_fl_ps_cn.rst加入对应文档的index_cn文件中

[paddle-bot[bot]]

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[sunzhongkai588]

docs/guides/06_distributed_training/cluster_quick_start_fl_ps_cn.rst 的一些格式需要改一下，可能当初研发提交的时候没有注意，比如：

• 很多链接显示不正确，如 https://github.com/PaddlePaddle/docs/blob/668676e0da7f4b186d9ffafd6c44601face3733c/docs/guides/06_distributed_training/cluster_quick_start_fl_ps_cn.rst#L18 ，可以参考正确写法 https://github.com/PaddlePaddle/docs/blob/668676e0da7f4b186d9ffafd6c44601face3733c/docs/guides/06_distributed_training/deployment_cn.rst#L33
• 显示不正确，可能不同的缩进得隔一行

https://github.com/PaddlePaddle/docs/blob/668676e0da7f4b186d9ffafd6c44601face3733c/docs/guides/06_distributed_training/cluster_quick_start_fl_ps_cn.rst#L44-L46

• coordinator_num 后面加一个空格，否则无法正确显示

[Wang-ZengWei]

@sunzhongkai588

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