Added double quote wrap in activate_python_virtual_environment to handle
spaces in path.
Would fail to find venv activate script when spaces exist.


Release Notes:

- Fixed venv_detection activation not finding directory if space is in
the path

![image](https://github.com/zed-industries/zed/assets/52263845/9bf95b92-c6d4-4e2c-9158-d91a41c10216)


- With changes

![image](https://github.com/zed-industries/zed/assets/52263845/93602ae7-d991-494b-89c3-5afcce556888)