build(deps): update itertools requirement from 0.13 to 0.14 (#631)

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@v0.13.0...v0.14.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

actix-tls/Cargo.toml

@@ -120,7 +120,7 @@ actix-rt = "2.2"
 actix-server = "2"
 bytes = "1"
 futures-util = { version = "0.3.17", default-features = false, features = ["sink"] }
-itertools = "0.13"
+itertools = "0.14"
 pretty_env_logger = "0.5"
 rcgen = "0.13"
 rustls-pemfile = "2"