fix: bump Megatron-LM submodule to include upstream checkpoint segfault fix#2085

Closed

dafu-wu wants to merge 1 commit intoNVIDIA-NeMo:mainfrom

dafu-wu:fix/bump-mcore-fix-checkpoint-segfault

Commits on Mar 7, 2026

fix: bump Megatron-LM and add CUDA sync before checkpoint save
dafu-wu
committed