Update combine requirement from ~4.3 to ~4.6

Updates the requirements on [combine](https://github.com/Marwes/combine) to permit the latest version.
- [Release notes](https://github.com/Marwes/combine/releases)
- [Changelog](https://github.com/Marwes/combine/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Marwes/combine/compare/v4.3.0...v4.6.0)

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

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

tools/cli/Cargo.toml

@@ -19,7 +19,7 @@ doc = false
 test = false
 
 [dependencies]
-combine = "~4.3"
+combine = "~4.6"
 dirs = "~3.0"
 env_logger = "~0.8"
 failure = "~0.1"