Bump urllib3 from 1.26.5 to 1.26.17 in /scheduler

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.5 to 1.26.17.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.5...1.26.17)

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

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

scheduler/requirements.txt

@@ -7,5 +7,5 @@ kafka-python==2.0.2
 lxml==4.6.3
 requests==2.25.1
 ujson==4.0.2
-urllib3==1.26.5
+urllib3==1.26.17
 coolname==1.1.0