chore(deps): bump urllib3 from 1.26.15 to 1.26.18 in /samples/geography (#1684)

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

Author: dependabot[bot]

samples/geography/requirements.txt

@@ -42,4 +42,4 @@ Shapely==2.0.1
 six==1.16.0
 typing-extensions==4.7.1
 typing-inspect==0.9.0
-urllib3==1.26.15
+urllib3==1.26.18