Bump urllib3 from 1.26.15 to 1.26.18

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.15 to 1.26.18.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.15...1.26.18)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -24,7 +24,7 @@ readability-lxml==0.8.1
 requests==2.29.0
 setuptools==67.7.2
 soupsieve==2.3.2.post1
-urllib3==1.26.15
+urllib3==1.26.18
 waitress==2.1.2
 Werkzeug==3.0.3
 wheel==0.40.0