Update flake8-builtins requirement from <1.6,>=1.5 to >=1.5,<2.3

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:production
...

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

requirements.txt

@@ -18,7 +18,7 @@ scrapy>=2.5,<2.7
 # -----------------------
 black
 flake8>=4,<5.1
-flake8-builtins>=1.5,<1.6
+flake8-builtins>=1.5,<2.3
 flake8-isort>=4.0,<4.3
 isort>=5.7,<5.10
 pre-commit>=2.15,<2.21