chore(beep boop 🤖): Bump `MCORE_TAG=ddd920f...` (2024-11-22)
🚀 PR to bump `NVIDIA/Megatron-LM` in `Dockerfile.ci` to `MCORE_TAG=ddd920f9dd1b20f259314a969513372008d5ee2c`.  

📝 Please remember the following to-do's before merge: 
- [ ] Verify the presubmit CI  

🙏 Please merge this PR only if the CI workflow completed successfully.