Update toml requirement from 0.8 to 0.9

Updates the requirements on [toml](https://github.com/toml-rs/toml) to permit the latest version.
- [Commits](toml-rs/toml@toml-v0.8.0...toml-v0.9.4)

---
updated-dependencies:
- dependency-name: toml
  dependency-version: 0.9.4
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -21,7 +21,7 @@ assert_cmd = "2"
 predicates = "3"
 pretty_assertions = "1"
 tempfile = "3"
-toml = "0.8"
+toml = "0.9"
 
 [profile.release]
 lto = true