fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-WAITRESS-8309635
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-8309091
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-8309092

requirements.txt

@@ -14,6 +14,6 @@ requests==2.25.1
 six==1.15.0
 soupsieve==2.0.1
 urllib3==1.26.5
-waitress==1.4.4
+waitress==3.0.1
 websockets==9.1
-Werkzeug==1.0.1
+Werkzeug==3.0.6