Update dependency ray to v2.9.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ray	>=2.9.0 -> >=2.9.1

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Release Notes

ray-project/ray (ray)

v2.9.1

Compare Source

This patch release contains fixes for Ray Core, Ray Data, and Ray Serve.

Ray Core

🔨 Fixes:

• Adding debupgy as the ray debugger (#​42311)
• Fix task events profile events per task leak (#​42248)
• Make sure redis sync context and async context connect to the same redis instance (#​42040)

Ray Data

🔨 Fixes:

• [Data] Retry write if error during file clean up (#​42326)

Ray Serve

🔨 Fixes:

• Improve handling the websocket server disconnect scenario (#​42130)
• Fix pydantic config documentation (#​42216)
• Address issues under high network delays:
  • Enable setting queue length response deadline via environment variable (#​42001)
  • Add exponential backoff for queue_len_response_deadline_s (#​42041)

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