Update toml requirement from 0.7.1 to 0.8.0

Updates the requirements on [toml](https://github.com/toml-rs/toml) to permit the latest version.
- [Commits](toml-rs/toml@toml-v0.7.1...toml-v0.8.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

api_generator/Cargo.toml

@@ -30,7 +30,7 @@ serde_json = "~1"
 simple_logger = "4.0.0"
 syn = { version = "2.0", features = ["extra-traits", "full"] }
 tar = "0.4"
-toml = "0.7.1"
+toml = "0.8.0"
 url = "2.1.1"
 void = "1.0.2"
 html-escape = "0.2.11"