fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-14192442
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-14192443
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-14151620

Author: snyk-bot

requirements.txt

@@ -6,9 +6,10 @@ face_recognition==1.3.0
 redis==4.1.2
 Flask_MonitoringDashboard==3.1.1
 Flask==1.1.2
-Werkzeug==2.0.3
+Werkzeug==3.1.4
 tqdm==4.62.3
 olefile==0.46
 Pillow==8.3.2
 py-bcrypt==0.4
-scikit_learn==0.22.2.post1
+scikit_learn==0.22.2.post1
+urllib3>=2.6.0 # not directly required, pinned by Snyk to avoid a vulnerability