Merge pull request #777 from srivatsankrishnan/m-bridge

B200 M-bridge misconfig

Author: srivatsankrishnan

conf/experimental/megatron_bridge/test/b200/megatron_bridge_qwen_30b.toml

@@ -30,7 +30,7 @@ gpu_type = "b200"
 container_image = "nvcr.io#nvidia/nemo:25.11.01"
 model_name = "qwen3"
 model_size = "30b_a3b"
-gpus_per_node = 4
+gpus_per_node = 8
 num_gpus = 8
 domain = "llm"
 task = "pretrain"