[DOCS] for sample: monitor-cloud-logging : logging submodule

### Which sample?

https://github.com/firebase/functions-samples/blob/703c0359eacf07a551751d1319d34f912a2cd828/Python/quickstarts/monitor-cloud-logging/functions/main.py#L8-L8

### What is the issue with this sample's docs?

**Description:**

I encountered an issue while trying to use the `logger` submodule from the `firebase_functions` module. According to the documentation and examples, it seems like there should be a `logger` submodule available, but it doesn't exist in the installed package.

**Steps to Reproduce:**

1. Install `firebase_functions` using pip.
2. Attempt to import the `logger` submodule as shown below:

```python
from firebase_functions import logger
```

3. Run the script.

**Expected Behavior:**
The `logger` submodule should be imported without any errors.

**Actual Behavior:**
The following error is raised: `ImportError: cannot import name 'logger' from 'firebase_functions' (/path/to/venv/lib/python3.12/site-packages/firebase_functions/init.py)`