Bump urllib3 from 1.25.3 to 1.26.5 in /integrations/python-client

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.3 to 1.26.5.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.25.3...1.26.5)

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

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

Author: dependabot[bot]

integrations/python-client/requirements.txt

@@ -10,4 +10,4 @@ Pygments==2.2.0
 pytz==2017.2
 requests==2.22.0
 shapely==1.5.17
-urllib3==1.25.3
+urllib3==1.26.5