Bump quinn-proto from 0.9.3 to 0.9.6

Bumps [quinn-proto](https://github.com/quinn-rs/quinn) from 0.9.3 to 0.9.6.
- [Release notes](https://github.com/quinn-rs/quinn/releases)
- [Commits](https://github.com/quinn-rs/quinn/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>