Bump pip-tools from 6.1.0 to 6.2.0

Bump pip-tools from 6.1.0 to 6.2.0

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 6.1.0 to 6.2.0.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/6.1.0...6.2.0)

---
updated-dependencies:
- dependency-name: pip-tools
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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