Improve documentation gpt_training.rst 
@yaoyu-33  This PR is stale because it has been open for 14 days with no activity. Remove stale label or comment or update or this will be closed in 7 days. This PR was closed because it has been inactive for 7 days since being marked as stale. /cicd
**PR Type**:
- [ ] New Feature
- [ ] Bugfix
- [x] Documentation
