Bump quinn-proto from 0.11.6 to 0.11.9

Bumps [quinn-proto](https://github.com/quinn-rs/quinn) from 0.11.6 to 0.11.9.
- [Release notes](https://github.com/quinn-rs/quinn/releases)
- [Commits](quinn-rs/quinn@quinn-proto-0.11.6...quinn-proto-0.11.9)

---
updated-dependencies:
- dependency-name: quinn-proto
  dependency-type: indirect
...

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Author: dependabot[bot]