Bump black from 23.11.0 to 23.12.1 in /py

Bumps [black](https://github.com/psf/black) from 23.11.0 to 23.12.1.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@23.11.0...23.12.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

py/dev_requirements.txt

@@ -1,2 +1,2 @@
-black==23.11.0
+black==23.12.1
 flit==3.9.0