[CP V1 Deprecation 5/5] Update prefill CP documentation (#36230)

docs/cookbook/autoregressive/GLM/GLM-5.2.mdx

@@ -254,6 +254,10 @@ For the full setup (streaming, tool-use, count_tokens, persisting env in `~/.cla
 
 ### 3.5 Context Parallelism
 
+<Warning>
+Zigzag prefill CP (`--cp-strategy zigzag`) is temporarily unavailable for GLM-5.2. For prefill CP on CUDA, use `interleave` with `--dp 1` as shown below.
+</Warning>
+
 Prefill context parallelism can help with reduction of TTFT under long context. To enable prefill context parallelism for GLM 5.2, please append the following arguments:
 ```bash
 --attn-cp-size 8 \