Update B300 FP4 SGLang (non-MTP) image to latest nightly

Bumps dsv4-fp4-b300-sglang image from
lmsysorg/sglang:nightly-dev-cu13-20260529-a8cfae0b to
lmsysorg/sglang:nightly-dev-cu13-20260624-b2c8f7a2.

Author: hshrivastava-droid

.github/configs/nvidia-master.yaml

@@ -2004,7 +2004,7 @@ dsr1-fp8-b300-sglang:
 # DeepSeek-V4-Pro on B300 with sglang (non-MTP).
 # Uses nightly image with megamoe backend for high-concurrency profiles.
 dsv4-fp4-b300-sglang:
-  image: lmsysorg/sglang:nightly-dev-cu13-20260529-a8cfae0b
+  image: lmsysorg/sglang:nightly-dev-cu13-20260624-b2c8f7a2
   model: deepseek-ai/DeepSeek-V4-Pro
   model-prefix: dsv4
   runner: b300

perf-changelog.yaml

@@ -4153,3 +4153,9 @@
     - "Run the PR #1891 MiniMax-M3 MXFP8 B300 Dynamo-vLLM recipe set on top of current main."
     - "Uses the vllm/vllm-openai:minimax-m3-0618-x86_64-cu130 image and the TEP4/TEP8 8k1k topologies not covered by PR #1890."
   pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/1891
+
+- config-keys:
+    - dsv4-fp4-b300-sglang
+  description:
+    - "Update B300 FP4 SGLang (non-MTP) image to latest nightly: lmsysorg/sglang:nightly-dev-cu13-20260624-b2c8f7a2 (was nightly-dev-cu13-20260529-a8cfae0b)."
+  pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/XXX