chore(deps): Bump urllib3 in /demo/playground/scripts

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.0.2 to 2.0.6.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.0.2...2.0.6)

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

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

demo/playground/scripts/requirements.txt

@@ -20,5 +20,5 @@ requests==2.31.0; python_version >= "3.7"
 routes==2.5.1
 six==1.16.0; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.3.0"
 tomli==2.0.1; python_version < "3.11" and python_version >= "3.7"
-urllib3==2.0.2; python_version >= "3.7"
+urllib3==2.0.6; python_version >= "3.7"
 yarl==1.9.2; python_version >= "3.7"