"Signal" is not exported from module "qtpy.QtCore"

With qtpy 2.4.3 and PySide6 6.1.0, I'm unable to use `QtCore.Signal` without an error from Pylance in VSCode:

`"Signal" is not exported from module "qtpy.QtCore"`

I've tried this on a fresh VM with with vscode and I get the same error.

```python
from qtpy import QtCore

signal = QtCore.Signal()
```