docs: pin sphinx-argparse to < 0.5.0 (#683)

Pin sphinx-argparse to <0.5.0 due to sphinx-doc/sphinx-argparse#56.

Generated by the task: njzjz-bot/njzjz-bot#7.


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

## Summary by CodeRabbit

- **Chores**
- Updated `sphinx-argparse` dependency version to `<0.5.0` to ensure
compatibility.

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

Author: njzjz-bot

pyproject.toml

@@ -59,7 +59,7 @@ docs = [
     'numpydoc',
     'm2r2',
     'deepmodeling-sphinx>=0.1.1',
-    'sphinx-argparse',
+    'sphinx-argparse<0.5.0',
     'rdkit',
     'jupyterlite-sphinx',
     'jupyterlite-xeus',