Update itertools requirement from 0.11.0 to 0.12.0

Updates the requirements on [itertools](https://github.com/rust-itertools/itertools) to permit the latest version.
- [Changelog](https://github.com/rust-itertools/itertools/blob/master/CHANGELOG.md)
- [Commits](rust-itertools/itertools@v0.11.0...v0.11.0)

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

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

Cargo.toml

@@ -90,7 +90,7 @@ rcgen = { default-features = false, version = "0.11.1" }
 rustls = { version = "0.21.6", default-features = false }
 rustls-pemfile = { default-features = false, version = "1.0.1" }
 tokio-rustls = { default-features = false, version = "0.24.1" }
-itertools = { version = "0.11.0", default-features = false }
+itertools = { version = "0.12.0", default-features = false }
 serde_millis = { default-features = false, version = "0.1.1" }
 multimap = { default-features = false, version = "0.9.0" }
 parking_lot = { version = "0.12.1" }