Merge pull request #144 from OpenSourceEcon/dependabot/pip/gunicorn-23.0.0

Bump gunicorn from 22.0.0 to 23.0.0

Author: rickecon

requirements.txt

@@ -3,7 +3,7 @@ Click==7.0
 Flask==2.2.5
 Flask-Assets==2.0
 Flask-Markdown==0.3
-gunicorn==22.0.0
+gunicorn==23.0.0
 itsdangerous==1.1.0
 Jinja2==3.1.6
 Markdown==3.2.2