bench: bump dsv4 gb300 sglang mtp 8p1d conc to 40960x65536

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

Author: Oseltamivir

.github/configs/nvidia-master.yaml

@@ -8726,7 +8726,7 @@ dsv4-fp4-gb300-dynamo-sglang-mtp3:
           dp-attn: true
       # Mid curve 8p1d-dep8-dep8. 18 nodes.
       - spec-decoding: mtp
-        conc-list: [32768, 65536]
+        conc-list: [40960, 65536]
         prefill:
           num-worker: 8
           tp: 8

benchmarks/multi_node/srt-slurm-recipes/sglang/deepseek-v4/8k1k/disagg-mid-curve-8p1d-dep8-dep8-mtp-c32768.yaml

@@ -151,7 +151,7 @@ benchmark:
   isl: 8192
   osl: 256
   random_range_ratio: 1.0
-  concurrencies: "32768x65536"
+  concurrencies: "40960x65536"
   req_rate: "inf"
   use_chat_template: true
   custom_tokenizer: "sa_bench_tokenizers.sglang_deepseek_v4.SGLangDeepseekV4Tokenizer"