Update README.md

README.md

-just _**bash start.sh**_!
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-Refer this link (https://r0ddbu55vzx.feishu.cn/wiki/GW6xwp87ciPbmAkk6l7c0FZ5nNf) to know the detils.
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-Easystart-085：Merge the dcu_env_check (refer to https://developer.sourcefind.cn/codes/OpenDAS/dcu_env_check/-/tree/main) & rccl-test (refer to https://www.ghproxy.cn/github.com/ROCm/rccl-tests.git).
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-The easystart of online-test is coming soon!
+请参考子目录里的Readme！