Bump gunicorn from 19.7.1 to 22.0.0

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 19.7.1 to 22.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@19.7.1...22.0.0)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-version: 22.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -4,7 +4,7 @@ pandas==0.19.2
 scikit-learn==0.18.1
 scipy==1.10.0
 Werkzeug==3.1.6
-gunicorn==19.7.1
+gunicorn==22.0.0
 vaderSentiment==2.5
 nltk==3.9.3
 textstat==0.4.1