Bump black from 22.6.0 to 26.3.1 in /tests (#374)

Bumps [black](https://github.com/psf/black) from 22.6.0 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@22.6.0...26.3.1)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

tests/poetry.lock

@@ -35,7 +35,7 @@ isort = "^5.10.1"
 flake8-isort = "^4.1.1"
 flake8-quotes = "^3.3.1"
 flake8-print = "^5.0.0"
-black = "^22.6.0"
+black = "^26.3.1"
 interrogate = "^1.5.0"