Bump pyflakes from 2.4.0 to 3.4.0 in /environment/requirements

Bumps [pyflakes](https://github.com/PyCQA/pyflakes) from 2.4.0 to 3.4.0.
- [Changelog](https://github.com/PyCQA/pyflakes/blob/main/NEWS.rst)
- [Commits](PyCQA/pyflakes@2.4.0...3.4.0)

---
updated-dependencies:
- dependency-name: pyflakes
  dependency-version: 3.4.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

environment/requirements/requirements-dev.txt

@@ -1,5 +1,5 @@
 flake8==4.0.1
 mccabe==0.6.1
 pycodestyle==2.8.0
-pyflakes==2.4.0
+pyflakes==3.4.0
 ipython==7.28.0

environment/requirements/requirements.txt

@@ -17,7 +17,7 @@ prompt_toolkit==3.0.52
 psycopg2-binary==2.9.10
 ptyprocess==0.7.0
 pycodestyle==2.8.0
-pyflakes==2.4.0
+pyflakes==3.4.0
 Pygments==2.19.2
 sqlparse==0.5.3
 traitlets==5.14.3