Update poem-openapi requirement from 2.0.26 to 3.0.0

Updates the requirements on [poem-openapi](https://github.com/poem-web/poem) to permit the latest version.
- [Release notes](https://github.com/poem-web/poem/releases)
- [Commits](https://github.com/poem-web/poem/commits)

---
updated-dependencies:
- dependency-name: poem-openapi
  dependency-type: direct:production
...

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

Cargo.toml

@@ -18,7 +18,7 @@ serde = ["dep:serde"]
 itertools = { version = "0.11.0", default-features = false, features = ["use_std"] }
 paste = { version = "1.0.12", default-features = false }
 poem = { version = "1.3.55", default-features = false }
-poem-openapi = { version = "2.0.26", default-features = false }
+poem-openapi = { version = "3.0.0", default-features = false }
 sea-orm = { version = "0.11.3", default-features = false, optional = true, features = ["macros"] }
 serde = { version = "1.0.167", default-features = false, optional = true }
 tokio-shield = { version = "0.1.0", default-features = false, optional = true }