Update flake8 requirement from ~=6.0.0 to ~=7.0.0

Updates the requirements on [flake8](https://github.com/pycqa/flake8) to permit the latest version.
- [Commits](PyCQA/flake8@6.0.0...7.0.0)

---
updated-dependencies:
- dependency-name: flake8
  dependency-type: direct:production
...

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

dev_scripts/package_requirements.txt

@@ -1,7 +1,7 @@
 --extra-index-url https://packages.idmod.org/api/pypi/idm-pypi-production/simple
 bump2version~=1.0.1
 coverage>=5.3,<6.6
-flake8~=6.0.0
+flake8~=7.0.0
 packaging~=24.0
 idm-buildtools~=1.0.3
 twine~=4.0.2