Bump urllib3 from 1.26.16 to 1.26.18

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.16 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@1.26.16...1.26.18)

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

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

Author: dependabot[bot]

requirements.txt

@@ -214,7 +214,7 @@ typing_extensions==4.6.2
 tzdata==2023.3
 uc-micro-py==1.0.2
 uritemplate==4.1.1
-urllib3==1.26.16
+urllib3==1.26.18
 urllib3-secure-extra==0.1.0
 uvicorn==0.22.0
 vcrpy==4.3.1