Python SDK examples README overstates async.py coverage

What happened?

sdk/python/examples/README.md says:

Each example folder contains runnable versions:
- sync.py
- async.py

However, sdk/python/examples/09_async_parity/ currently contains sync.py but no async.py. The generic run instructions also tell users to run python examples/<example-folder>/async.py, which does not work for that folder.

Expected behavior

Either every example folder should contain both sync.py and async.py, or the examples README should call out exceptions such as 09_async_parity.

Additional context

I searched open issues and PRs for 09_async_parity, the README wording, and Python SDK examples, and did not find an existing open item that appears to cover this examples-doc mismatch.