chore(deps): bump gunicorn from 21.2.0 to 22.0.0 in /src

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 21.2.0 to 22.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@21.2.0...22.0.0)

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

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

Author: dependabot[bot]

src/poetry.lock

@@ -11,7 +11,7 @@ readme = "README.md"
 python = "^3.10"
 pendulum = "^3.0.0"
 uvicorn = "^0.27.0"
-gunicorn = "^21.2.0"
+gunicorn = "^22.0.0"
 websockets = "^12.0"
 redis = "^4.6.0"
 asyncpg = "^0.28.0"