Bump flake8 in /packages/core/minos-microservice-networks

Bumps [flake8](https://github.com/pycqa/flake8) from 4.0.1 to 7.1.2.
- [Commits](PyCQA/flake8@4.0.1...7.1.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]