chore(deps): update flake8 requirement from <8,>=5.0.4 to >=7.3.0,<8

Updates the requirements on [flake8](https://github.com/pycqa/flake8) to permit the latest version.
- [Commits](PyCQA/flake8@5.0.4...7.3.0)

---
updated-dependencies:
- dependency-name: flake8
  dependency-version: 7.3.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/tools.txt

@@ -1,7 +1,7 @@
 mypy<=1.19.1;
 # while flake8 5.x have issues with Python 3.12, flake8 6.x requires Python >= 3.8.1,
 # so 5.x should be kept in order to stay compatible with Python 3.7/3.8
-flake8>=5.0.4,<8
+flake8>=7.3.0,<8
 #  Don't change this version without running CI builds;
 #  The latest version may not be available for older Python runtime
 black==24.3.0;