Update flake8 requirement from <6.1,>=3.8 to >=3.8,<6.2 in /requirements

Updates the requirements on [flake8](https://github.com/pycqa/flake8) to permit the latest version.
- [Commits](PyCQA/flake8@3.8.0...6.1.0)

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

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

requirements/development.txt

@@ -3,7 +3,7 @@
 
 # tooling
 black
-flake8>=3.8,<6.1
+flake8>=3.8,<6.2
 flake8-builtins>=1.5,<2.2
 flake8-isort>=4.0,<6.1
 flake8-print>=5,<5.1