Bump gunicorn from 22.0.0 to 23.0.0 in /examples/gunicorn

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 22.0.0 to 23.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@22.0.0...23.0.0)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-version: 23.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/gunicorn/poetry.lock

@@ -7,7 +7,7 @@ readme = "README.md"
 
 [tool.poetry.dependencies]
 python = "^3.10"
-gunicorn = "^22.0.0"
+gunicorn = "^23.0.0"
 prefab-cloud-python = {path = "../..", develop = true}
 cachetools = "5.3.2"
 protobuf = "^4.25.8"