Bump urllib3 version to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-7267250

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

Author: cld-sec

requirements.txt

@@ -5,3 +5,4 @@ click
 click-log
 requests
 docstring-parser
+urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability