fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-10390193
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-10390194

Author: snyk-bot

requirements.txt

@@ -2,3 +2,4 @@ black
 pre-commit
 requests
 ruff
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability