⬆️ Bump setuptools from 60.2.0 to 60.3.1 in /tvheadend (#73)

Bumps [setuptools](https://github.com/pypa/setuptools) from 60.2.0 to 60.3.1.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/CHANGES.rst)
- [Commits](https://github.com/pypa/setuptools/compare/v60.2.0...v60.3.1)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tvheadend/requirements.txt

@@ -1,2 +1,2 @@
-setuptools==60.2.0
+setuptools==60.3.1
 streamlink==3.0.3