Bump flake8-bugbear from 24.12.12 to 25.10.21 in /demos

Bumps [flake8-bugbear](https://github.com/PyCQA/flake8-bugbear) from 24.12.12 to 25.10.21.
- [Release notes](https://github.com/PyCQA/flake8-bugbear/releases)
- [Commits](PyCQA/flake8-bugbear@24.12.12...25.10.21)

---
updated-dependencies:
- dependency-name: flake8-bugbear
  dependency-version: 25.10.21
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

demos/moderator/requirements-dev.txt

@@ -8,7 +8,7 @@ scipy==1.16.2
 
 
 flake8==7.3.0
-flake8-bugbear==24.12.12
+flake8-bugbear==25.10.21
 flake8-quotes==3.4.0
 ipdb==0.13.13
 mypy==1.18.2