Bump black from 25.1.0 to 25.9.0 in /requirements

Bumps [black](https://github.com/psf/black) from 25.1.0 to 25.9.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@25.1.0...25.9.0)

---
updated-dependencies:
- dependency-name: black
  dependency-version: 25.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements/local.txt

@@ -11,7 +11,7 @@ azure.functions==1.23.0   # used for linting code in ./titanic-survival-app/__in
 
 # Code linters, formatters, and security scanners
 # ------------
-black==25.1.0
+black==25.9.0
 flake8==7.3.0
 flake8-coding==1.3.2
 pre-commit==4.2.0