community/py3-gunicorn: security upgrade to 23.0.0

Fix CVE-2024-1135: Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities.

• https://github.com/benoitc/gunicorn/releases/tag/23.0.0
• https://github.com/advisories/GHSA-w3h3-4rj7-4ph4