Bump clap_mangen from 0.2.20 to 0.2.22

Bumps [clap_mangen](https://github.com/clap-rs/clap) from 0.2.20 to 0.2.22.
- [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-v0.2.20...clap_mangen-v0.2.22)

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

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

xtask/Cargo.toml

@@ -10,4 +10,4 @@ authors = ["Gaëtan Lehmann <gaetan.lehmann@gmail.com>"]
 yage = { path=".." }
 clap = { version = "4.5.4", features = ["derive", "env", "wrap_help"] }
 clap-markdown = "0.1.3"
-clap_mangen = "0.2.18"
+clap_mangen = "0.2.22"