evaluate.py: missing pip package promptflow.azure

> Please provide us with the following information:
> ---------------------------------------------------------------

### This issue is for a: (mark with an `x`)
```
- [x] bug report -> please search issues before submitting
- [ ] feature request
- [x] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```

### Minimal steps to reproduce
> follow instructions https://learn.microsoft.com/en-us/azure/ai-studio/tutorials/copilot-sdk-evaluate-deploy#run-the-evaluation-script
pip install is missing package promptflow.azure
this leads to an exception when running python evaluate.py

The documentation need to be updated:
pip install promptflow-evals
pip install promptflow.azure

### Any log messages given by the failure
>(.venv) PS C:\work\Azure-Samples\rag-data-openai-python-promptflow\tutorial> python .\evaluate.py
Traceback (most recent call last):
File "C:\Users\...\.venv\Lib\site-packages\promptflow\_sdk\_tracing.py", line 107, in validate
from promptflow.azure._utils._tracing import validate_trace_destination
ModuleNotFoundError: No module named 'promptflow.azure'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\work\Azure-Samples\rag-data-openai-python-promptflow\tutorial\evaluate.py", line 80, in
result, tabular_result = run_evaluation(
^^^^^^^^^^^^^^^
File "C:\work\Azure-Samples\rag-data-openai-python-promptflow\tutorial\evaluate.py", line 49, in run_evaluation
result = evaluate(
^^^^^^^^^
File "C:\Users\...\.venv\Lib\site-packages\promptflow\evals\evaluate\_telemetry\__init__.py", line 115, in wrapper
pf_client = PFClient(
^^^^^^^^^

### Expected/desired behavior
> pip install promptflow.azure

### OS and Version?
> Windows 7, 8 or 10. Linux (which distribution). macOS (Yosemite? El Capitan? Sierra?)

### Versions
>

### Mention any other details that might be useful

> ---------------------------------------------------------------
> Thanks! We'll be in touch soon.

Inizia con il tutorial di valutazione di Copilot SDK collegato e confronta i relativi comandi di installazione con tutorial/evaluate.py, in particolare gli imports e la chiamata a run_evaluation. Aggiorna la configurazione documentata in modo che venga installato il pacchetto richiesto, quindi segui il tutorial ed esegui python evaluate.py per confermare che l’errore dovuto all’assenza di promptflow.azure sia stato risolto.

Scritto dal modello di indicizzazione a partire dal testo della issue.