Bump black from 25.11.0 to 25.12.0 in /{{ cookiecutter.__project_name }}

Bumps [black](https://github.com/psf/black) from 25.11.0 to 25.12.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@25.11.0...25.12.0)

---
updated-dependencies:
- dependency-name: black
  dependency-version: 25.12.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

{{ cookiecutter.__project_name }}/poetry.lock

@@ -19,7 +19,7 @@ pytest-cov = "^7.0.0"
 
 [tool.poetry.group.lint.dependencies]
 mypy = "^1.19.0"
-black = "^25.11.0"
+black = "^25.12.0"
 isort = "^7.0.0"
 pre-commit = "^4.5.0"
 ruff = "^0.14.8"