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

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-JINJA2-9292516

Author: snyk-bot

engines/owl_dns/requirements.txt

@@ -11,7 +11,7 @@ gunicorn==20.1.0
 idna==3.4
 ipwhois==1.2.0
 itsdangerous==2.1.2
-Jinja2==3.1.2
+Jinja2==3.1.6
 MarkupSafe==2.1.1
 PatrowlEnginesUtils>=1.0.2
 python-whois==0.8.0