fix: fix typo in run_train (#1581)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Refactor**
- Renamed internal function `make_train_dp` to `run_train_dp` for better
clarity and consistency within the codebase.

(Note: This change does not impact end-user functionalities directly.)

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: Jinzhe Zeng <[email protected]>

dpgen/generator/run.py

@@ -728,7 +728,7 @@ def get_nframes(system):
 def run_train(iter_index, jdata, mdata):
     mlp_engine = jdata.get("mlp_engine", "dp")
     if mlp_engine == "dp":
-        return make_train_dp(iter_index, jdata, mdata)
+        return run_train_dp(iter_index, jdata, mdata)
     else:
         raise ValueError(f"Unsupported engine: {mlp_engine}")