[modular]simplify components manager doc (#13088)
* simplify components manager doc
* Apply suggestion from @yiyixuxu
* Apply suggestion from @stevhliu
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>
* Apply suggestion from @stevhliu
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>
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Co-authored-by: yiyi@huggingface.co <yiyi@ip-26-0-160-103.ec2.internal>
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>
