fix: apply ruff fixes to ray_serve package

[ray-serve only]

- Fix whitespace in docstrings
- Add strict=True to zip() calls
- Use ternary operators where appropriate
- Rename unused loop variables

ray-serve/ray_serve/__init__.py

@@ -12,4 +12,4 @@ __all__ = [
     "reranker_app",
     "tts_app",
     "whisper_app",
-]
+]