Bump urllib3 from 1.26.12 to 1.26.18

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.12 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@1.26.12...1.26.18)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -160,7 +160,7 @@ trove-classifiers==2023.11.29
 typing_extensions==4.9.0
 uhi==0.3.3
 uri-template==1.2.0
-urllib3==1.26.12
+urllib3==1.26.18
 virtualenv==20.25.0
 wcwidth==0.2.6
 webcolors==1.12