docs: change query execution to use asyncio.run

[yangzq50]

Updated the query execution to run asynchronously using asyncio.

Issue Link / Problem Description

The issue on line 49 of the file docs/howtos/applications/evaluate-and-improve-rag.md is that it uses the await keyword at the top level of the script.

Description of the Issue:

In Python, the await keyword is only allowed within an asynchronous function (defined with async def). When the code snippet provided in the documentation is run as a standard Python script (e.g., python script.py), it will fail with the following error:
SyntaxError: 'await' outside function

Context (Lines 33–51):

The code block imports asyncio (line 35) but fails to use it to execute the asynchronous rag.query() method.

Changes Made

To make the script runnable, the asynchronous logic should be executed using asyncio.run():

# Query the system
question = "What architecture is the `tokenizers-linux-x64-musl` binary designed for?"
result = asyncio.run(rag.query(question))
print(f"Answer: {result['answer']}")

Testing

How to Test

• Manual testing

References

• Related issues:
• Documentation:
• External references:

Screenshots/Examples (if applicable)

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[anistark]

Thanks @yangzq50 for the fix. 🙌🏼