Bump gunicorn from 20.0.4 to 23.0.0

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 20.0.4 to 23.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@20.0.4...23.0.0)

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

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

Author: dependabot[bot]

Pipfile

@@ -10,7 +10,7 @@ selenium = "*"
 
 [packages]
 wheel = "*"
-gunicorn = "==20.0.4"
+gunicorn = "==23.0.0"
 ibmcloudenv = "==0.2.1"
 livereload = "==2.6.2"
 sqlparse = "==0.3.1"