Bump urllib3 from 1.26.17 to 1.26.18 in /images/minesweeper

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]>

images/minesweeper/requirements.txt

@@ -45,7 +45,7 @@ six==1.16.0
     #   google-auth
     #   kubernetes
     #   python-dateutil
-urllib3==1.26.17
+urllib3==1.26.18
     # via
     #   google-auth
     #   kubernetes