chore(deps): bump clap_mangen from 0.2.15 to 0.2.20

Bumps [clap_mangen](https://github.com/clap-rs/clap) from 0.2.15 to 0.2.20.
- [Release notes](https://github.com/clap-rs/clap/releases)
- [Changelog](https://github.com/clap-rs/clap/blob/master/CHANGELOG.md)
- [Commits](clap-rs/clap@clap_mangen-v0.2.15...clap_mangen-v0.2.20)

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

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

Cargo.toml

@@ -19,7 +19,7 @@ urlencoding = "2.1.3"
 [build-dependencies]
 clap = { version = "4.5.4", features = ["derive"] }
 clap_complete = "4.4.10"
-clap_mangen = "0.2.15"
+clap_mangen = "0.2.20"
 
 [dev-dependencies]
 assert_cmd = "2.0.12"