### What this PR does / why we need it?
Added support for A2 in the GLM-5 doc.
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
vLLM version: v0.15.0
vLLM main:
9562912cea
- vLLM version: v0.15.0
- vLLM main:
9562912cea