Bump rustls from 0.21.8 to 0.21.9

Bumps [rustls](https://github.com/rustls/rustls) from 0.21.8 to 0.21.9.
- [Release notes](https://github.com/rustls/rustls/releases)
- [Commits](rustls/rustls@v/0.21.8...v/0.21.9)

---
updated-dependencies:
- dependency-name: rustls
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.toml

@@ -32,7 +32,7 @@ uuid = { version = "1.5.0", default-features = false, features = [
     "fast-rng",
 ] }
 mimalloc = { version = "0.1.39", default-features = false }
-rustls = "0.21.8"
+rustls = "0.21.9"
 once_cell = "1.18.0"
 tokio-context = "0.1.3"
 tracing-core = "0.1.32"