fix: engines/owl_dns/requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-14192442
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-14192443

Author: snyk-bot

engines/owl_dns/requirements.txt

@@ -19,7 +19,7 @@ netaddr==0.8.0
 requests==2.28.1
 setuptools #==65.5.1  # not directly required, pinned by Snyk to avoid a vulnerability
 six==1.16.0
-urllib3==1.26.13
+urllib3==2.6.0
 validators==0.20.0
 werkzeug==2.2.3
 #whois==0.9.27