Update utoipa requirement from 3.0.1 to 4.1.0 (#51)

Updates the requirements on [utoipa](https://github.com/juhaku/utoipa) to permit the latest version.
- [Release notes](https://github.com/juhaku/utoipa/releases)
- [Commits](juhaku/utoipa@utoipa-3.0.1...utoipa-4.1.0)

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

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

Cargo.toml

@@ -31,7 +31,7 @@ bb8-postgres = "0.8.1"
 rand = "0.8.5"
 metrics = "0.21.0"
 metrics-exporter-prometheus = "0.12.0"
-utoipa = "3.0.1"
+utoipa = "4.1.0"
 refinery = { version = "0.8.4", features = ["tokio-postgres"] }
 ciborium = "0.2.0"
 async-trait = "0.1.53"