Update flake8-builtins requirement in /requirements

Updates the requirements on [flake8-builtins](https://github.com/gforcada/flake8-builtins) to permit the latest version.
- [Changelog](https://github.com/gforcada/flake8-builtins/blob/main/CHANGES.rst)
- [Commits](gforcada/flake8-builtins@1.5.0...2.2.0)

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

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

requirements/development.txt

@@ -3,7 +3,7 @@
 
 black
 flake8>=3.8,<6.2
-flake8-builtins>=1.5,<2.2
+flake8-builtins>=1.5,<2.3
 flake8-isort>=4.0,<6.2
 flake8-qgis>=1,<1.1
 isort>=5.7,<5.13