Bump psf/black from 24.8.0 to 26.3.0 in /.github/workflows

Bumps [psf/black](https://github.com/psf/black) from 24.8.0 to 26.3.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@24.8.0...26.3.0)

---
updated-dependencies:
- dependency-name: psf/black
  dependency-version: 26.3.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

.github/workflows/validate.yml

@@ -22,7 +22,7 @@ jobs:
     - name: Analysing the code with pylint
       run: |
         pylint featuremanagement
-    - uses: psf/black@24.8.0
+    - uses: psf/black@26.3.0
     - name: Run mypy
       run: |
         mypy featuremanagement