build(deps): update rustls requirement from 0.21.1 to 0.22.1

Updates the requirements on [rustls](https://github.com/rustls/rustls) to permit the latest version.
- [Release notes](https://github.com/rustls/rustls/releases)
- [Changelog](https://github.com/rustls/rustls/blob/main/CHANGELOG.md)
- [Commits](rustls/rustls@v/0.21.1...v/0.21.10)

---
updated-dependencies:
- dependency-name: rustls
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

wtransport/Cargo.toml

@@ -20,7 +20,7 @@ required-features = ["dangerous-configuration"]
 bytes = "1.4.0"
 quinn = "0.10.1"
 rcgen = { version = "0.12.0", optional = true }
-rustls = "0.21.1"
+rustls = "0.22.1"
 rustls-native-certs = "0.6.2"
 rustls-pemfile = "1.0.2"
 socket2 = "0.5.3"