Update toml requirement from 0.5 to 0.6

Updates the requirements on [toml](https://github.com/toml-rs/toml) to permit the latest version.
- [Release notes](https://github.com/toml-rs/toml/releases)
- [Commits](https://github.com/toml-rs/toml/compare/toml_datetime-v0.5.0...toml-v0.6.0)

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

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

acmed/Cargo.toml

@@ -30,11 +30,11 @@ nom = { version = "7.0", default-features = false, features = [] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 tinytemplate = "1.2"
-toml = "0.5"
+toml = "0.6"
 
 [target.'cfg(unix)'.dependencies]
 nix = "0.26"
 
 [build-dependencies]
 serde = { version = "1.0", features = ["derive"] }
-toml = "0.5"
+toml = "0.6"