fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-FLASK-5490129
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-6035177
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-6808933
- https://snyk.io/vuln/SNYK-PYTHON-ZIPP-7430899

Author: snyk-bot

requirements.txt

@@ -1,12 +1,14 @@
 setuptools==57.4.0
 elasticsearch==7.14.0
 netaddr==0.8.0
-flask==2.0.1
+flask==2.2.5
 terminable-thread==0.7.1 # library_name=terminable_thread
 watchdog==2.1.3
 pyshark==0.4.3
 oschmod==0.3.12
 argparse==1.4.0
 PyYAML==5.4.1 # library_name=yaml
 flask-swagger==0.2.14 # library_name=flask_swagger
-flask-swagger-ui==3.36.0 # library_name=flask_swagger_ui
+flask-swagger-ui==3.36.0 # library_name=flask_swagger_ui
+werkzeug>=3.0.3 # not directly required, pinned by Snyk to avoid a vulnerability
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability