Bump black from 25.12.0 to 26.1.0

Bumps [black](https://github.com/psf/black) from 25.12.0 to 26.1.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@25.12.0...26.1.0)

---
updated-dependencies:
- dependency-name: black
  dependency-version: 26.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 Jinja2==3.1.6
 pydantic==2.9.2
-black==25.12.0
+black==26.1.0
 pre-commit==4.5.1
 isort==7.0.0
 mypy==1.19.1