chore(deps): bump urllib3 from 1.26.17 to 1.26.18 in /samples/snippets (#914)

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: direct:production
...

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

Author: dependabot[bot]

samples/snippets/requirements.txt

@@ -30,4 +30,4 @@ shapely==2.0.1
 six==1.16.0
 sqlalchemy===1.4.27
 typing-extensions==4.7.1
-urllib3==1.26.17
+urllib3==1.26.18