[Klaud Cold] Update gptoss-fp4-b200-vllm vLLM image to v0.21.0 (#1466)

* Update gptoss-fp4-b200-vllm vLLM image to v0.21.0

Bumps the gpt-oss-120b FP4 B200 vLLM recipe from v0.20.2 (1d stale) to
the latest v0.21.0. Touches only gptoss-fp4-b200-vllm — the agentic
sibling stays pinned to v0.19.1 on its own track.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* chore: fill pr-link for #1466

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: functionstackx

.github/configs/nvidia-master.yaml

@@ -4225,7 +4225,7 @@ gptoss-fp4-b200-trt:
       - { tp: 8, conc-start:   4, conc-end:   4}
 
 gptoss-fp4-b200-vllm:
-  image: vllm/vllm-openai:v0.20.2
+  image: vllm/vllm-openai:v0.21.0
   model: openai/gpt-oss-120b
   model-prefix: gptoss
   runner: b200

perf-changelog.yaml

@@ -2790,3 +2790,9 @@
   description:
     - "Update SGLang image from nightly-dev-20260422-de962f32 (18d/12d old) to v0.5.12-cu130"
   pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/1473
+
+- config-keys:
+    - gptoss-fp4-b200-vllm
+  description:
+    - "Update vLLM image from v0.20.2 (1d old) to v0.21.0"
+  pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/1466