Bump gunicorn from 20.1.0 to 22.0.0

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 20.1.0 to 22.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@20.1.0...22.0.0)

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

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

Author: dependabot[bot]

poetry.lock

@@ -8,7 +8,7 @@ packages= [ { include = "HitosIV" }, ]
 [tool.poetry.dependencies]
 python = ">=3.7"
 hug = "^2.6.1"
-gunicorn = "^20.0.4"
+gunicorn = "^22.0.0"
 python-json-logger = "^2.0.1"
 etcd3 = "^0.12.0"
 python-dotenv = "^0.15.0"