⬆️ Bump gunicorn from 21.2.0 to 22.0.0 in /training

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] <support@github.com>

Author: dependabot[bot]

training/poetry.lock

@@ -17,7 +17,7 @@ pre-commit = "^3.3.3"
 click = "^8.1.7"
 requests = "^2.31.0"
 django-cors-headers = "^4.2.0"
-gunicorn = "^21.2.0"
+gunicorn = "^22.0.0"
 pytest = "^7.4.0"
 celery = {extras = ["redis", "sqs"], version = "^5.3.6"}