Fix IDE warnings (#12281)

### What problem does this PR solve?

As title

### Type of change

- [x] Refactoring

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

rag/prompts/__init__.py

@@ -3,4 +3,4 @@ from . import generator
 __all__ = [name for name in dir(generator)
            if not name.startswith('_')]
 
-globals().update({name: getattr(generator, name) for name in __all__})
+globals().update({name: getattr(generator, name) for name in __all__})