fix: lib/geonames/generators/vendor/guzzlehttp/ringphp/docs/requirements.txt to reduce vulnerabilities (#263)

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: benjaminpick

lib/geonames/generators/vendor/guzzlehttp/ringphp/docs/requirements.txt

@@ -1,3 +1,4 @@
 sphinx_rtd_theme
 sphinx>=3.0.4 # not directly required, pinned by Snyk to avoid a vulnerability
 setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
+urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability