Bump black from 25.11.0 to 25.12.0

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:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -35,7 +35,7 @@ dependencies    = [
 
 [project.optional-dependencies]
 black = [
-    "black==25.11.0",
+    "black==25.12.0",
 ]
 ruff = [
     "ruff==0.14.8",

requirements_black.txt

@@ -1 +1 @@
-black==25.11.0
+black==25.12.0