Fail to run `poetry run generate` in Windows

**Describe the issue:**
Running `poetry run generate` reports an error, the following error message appears:

**Repro Steps:**

1. Run `azd init --template llama-index-python`.
2. Run `azd auth login`.
3. Run
```
cd backend
python3 -m venv venv
source venv/bin/activate
poetry install
```
5. Run `azd up`.
6. Run `azd env get-values > .env`.
7. Run `poetry run generate`.

**Environment:**

- Azd version: azd version 1.9.5 (commit cd2b7af9995d358aab33c782614f801ac1997dde)
- OS: Windows

**Expected behavior:**
Running `poetry run generate` successfully.

@jongio and @marlenezw for notification.