fix(examples): split push-to-talk shebang arguments (#3210)

five executable examples use an env shebang without `-S`:

```
examples/audio.py
examples/speech_to_text.py
examples/text_to_speech.py
examples/realtime/realtime.py
examples/realtime/push_to_talk_app.py
```

added `push_to_talk_app.py` per your review. i checked every mode-100755
file under `examples/` and those five are the only ones missing `-S`.
(`azure.py`, `azure_ad.py` and `module_client.py` are 755 with no
shebang at all — different issue, left alone.)

also correcting myself: i said linux env splits the args so this only
broke on older BSD. that's wrong, it fails there too — on coreutils 9.4
`./examples/audio.py` gives `env: 'rye run python': No such file or
directory`.

only shebang lines change. modes unchanged, ruff check + format clean on
all five.

---------

Co-authored-by: stainless-app[bot] <142633134+stainless-app[bot]@users.noreply.github.com>
Co-authored-by: Marcus Wood <marcuswood@openai.com>