Update pip-tools requirement in /python/helpers

Updates the requirements on [pip-tools](https://github.com/jazzband/pip-tools) to permit the latest version.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/main/CHANGELOG.md)
- [Commits](jazzband/pip-tools@6.4.0...6.12.1)

---
updated-dependencies:
- dependency-name: pip-tools
  dependency-type: direct:production
...

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

python/helpers/requirements.txt

@@ -1,5 +1,5 @@
 pip>=21.3.1,<22.4.0  # Range maintains py36 support TODO: Review python 3.6 support in April 2023 (eol ubuntu 18.04)
-pip-tools>=6.4.0,<6.11.1  # Range maintains py36 support TODO: Review python 3.6 support in April 2023 (eol ubuntu 18.04)
+pip-tools>=6.4.0,<6.12.2  # Range maintains py36 support TODO: Review python 3.6 support in April 2023 (eol ubuntu 18.04)
 flake8==5.0.4
 hashin==0.17.0
 pipenv==2022.4.8