chore(deps-dev): bump black from 23.7.0 to 26.3.1

Bumps [black](https://github.com/psf/black) from 23.7.0 to 26.3.1.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@23.7.0...26.3.1)

---
updated-dependencies:
- dependency-name: black
  dependency-version: 26.3.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -1,4 +1,4 @@
-black==23.7.0
+black==26.3.1
 bump2version==1.0.1
 coveralls==3.3.1
 pytest-cov==4.1.0

setup.py

@@ -124,7 +124,7 @@
         "vcfpy==0.13.4",
     ],
     "dev": [
-        "black==23.7.0",
+        "black==26.3.1",
         "bump2version==1.0.1",
         "coveralls==3.3.1",
         "pytest==7.4.0",