build(deps): bump clap from 3.2.8 to 4.5.21

Bumps [clap](https://github.com/clap-rs/clap) from 3.2.8 to 4.5.21.
- [Release notes](https://github.com/clap-rs/clap/releases)
- [Changelog](https://github.com/clap-rs/clap/blob/master/CHANGELOG.md)
- [Commits](clap-rs/clap@v3.2.8...clap_complete-v4.5.21)

---
updated-dependencies:
- dependency-name: clap
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

boringtun-cli/Cargo.toml

@@ -10,7 +10,7 @@ edition = "2021"
 
 [dependencies]
 daemonize = "0.4.1"
-clap = { version = "3.1.6", features = ["env"] }
+clap = { version = "4.5.21", features = ["env"] }
 tracing = "0.1.40"
 tracing-subscriber = "0.3.9"
 tracing-appender = "0.2.3"