Bump handlebars from 4.1.6 to 4.2.2 (#11073)

Bumps [handlebars](https://github.com/sunng87/handlebars-rust) from 4.1.6 to 4.2.2.
- [Release notes](https://github.com/sunng87/handlebars-rust/releases)
- [Changelog](https://github.com/sunng87/handlebars-rust/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sunng87/handlebars-rust/compare/v4.1.6...v4.2.2)

---
updated-dependencies:
- dependency-name: handlebars
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

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

substrate/utils/frame/benchmarking-cli/Cargo.toml

@@ -40,7 +40,7 @@ clap = { version = "3.1.6", features = ["derive"] }
 chrono = "0.4"
 serde = "1.0.136"
 serde_json = "1.0.79"
-handlebars = "4.1.6"
+handlebars = "4.2.2"
 Inflector = "0.11.4"
 linked-hash-map = "0.5.4"
 log = "0.4.8"