chore(deps): bump urllib3 from 1.26.18 to 1.26.19 in /sdk/python

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.18 to 1.26.19.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/1.26.19/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.18...1.26.19)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: indirect
...

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

sdk/python/requirements.txt

@@ -159,7 +159,7 @@ uritemplate==3.0.1
     # via
     #   google-api-python-client
     #   kfp
-urllib3==1.26.18
+urllib3==1.26.19
     # via
     #   kfp
     #   kfp-server-api