fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-14896210

Author: snyk-bot

requirements.txt

@@ -20,5 +20,5 @@ requests==2.25.1
 sh==1.14.1
 six==1.15.0
 tld==0.12.5
-urllib3==1.26.2
+urllib3==2.6.3
 zope.interface==5.2.0