fix: services/workshop/requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-14151620

Author: snyk-bot

services/workshop/requirements.txt

@@ -16,7 +16,7 @@ PyJWT==2.7.0
 pymongo==3.13.0
 pyOpenSSL==23.1.1
 requests==2.30.0
-Werkzeug==2.0.3
+Werkzeug==3.1.4
 Faker==22.1.0
 gunicorn==21.2.0
 coverage==7.4.1