Bump gunicorn from 20.1.0 to 23.0.0 in /src

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 20.1.0 to 23.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@20.1.0...23.0.0)

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

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

Author: dependabot[bot]

src/requirements.txt

@@ -8,7 +8,7 @@ azure-cosmos==4.9.0
 quart==0.20.0
 uvicorn==0.34.0
 aiohttp==3.11.13
-gunicorn==20.1.0
+gunicorn==23.0.0
 pydantic-settings==2.8.1
 flake8==7.1.2
 black==25.1.0