build(deps): bump urllib3 from 1.26.17 to 1.26.18 in /examples/python (…

…#1369)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.17 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@1.26.17...1.26.18)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

examples/python/requirements.txt

@@ -49,5 +49,5 @@ requests==2.31.0
     #   google-cloud-storage
 rsa==4.7.2
     # via google-auth
-urllib3==1.26.17
+urllib3==1.26.18
     # via requests