CI: (deps): Bump flake8-requirements from 1.7.3 to 1.7.4 in /ci

Bumps [flake8-requirements](https://github.com/Arkq/flake8-requirements) from 1.7.3 to 1.7.4.
- [Release notes](https://github.com/Arkq/flake8-requirements/releases)
- [Commits](arkq/flake8-requirements@v1.7.3...v1.7.4)

---
updated-dependencies:
- dependency-name: flake8-requirements
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

ci/linting_requirements.txt

@@ -13,7 +13,7 @@ flake8-mutable==1.2.0
 flake8-pie==0.16.0
 flake8-print==5.0.0
 flake8-quotes==3.3.1
-flake8-requirements==1.7.3
+flake8-requirements==1.7.4
 flake8-simplify==0.19.3
 pep8-naming==0.13.2