[DOC]: a readme typo in "Run GPT With Colossal-AI"

[ErenChan]

📚 The doc issue

https://github.com/hpcaitech/ColossalAI/blob/main/examples/language/gpt/titans/README.md#29
there are two different cmds and they have the same comments.

run on multiple nodes with slurm

I think the first may be # run on multiple nodes with pytorch

[binmakeswell]

Hi @ErenChan You are right, the "with slurm" in line 29 is redundant. Thank you for your careful inspection.
Can you submit a PR to fix it? Contributors from the open source community are very welcome! Thanks.