### What this PR does / why we need it?
Fix issues in the GLM4.7 documentation and add some missing
explanations.
### Does this PR introduce _any_ user-facing change?
no
### How was this patch tested?
document test
- vLLM version: v0.17.0
- vLLM main:
8a680463fa
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Signed-off-by: zjks98 <zhangjiakang4@huawei.com>
Co-authored-by: zjks98 <zhangjiakang4@huawei.com>