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] <[email protected]>

pyproject.toml

@@ -37,7 +37,7 @@ dependencies = [
     "python-dateutil",
     "certbot==1.12.0",
     "Send2Trash==1.8.0",
-    "urllib3==1.26.15",
+    "urllib3==1.26.18",
 ]
 
 [project.entry-points]