build(deps-dev): update poethepoet requirement in /python-flask

Updates the requirements on [poethepoet](https://github.com/nat-n/poethepoet) to permit the latest version.
- [Release notes](https://github.com/nat-n/poethepoet/releases)
- [Commits](nat-n/poethepoet@v0.1.0...v0.30.0)

---
updated-dependencies:
- dependency-name: poethepoet
  dependency-type: direct:development
...

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

Author: dependabot[bot]

python-flask/requirements-dev.txt

@@ -1,2 +1,2 @@
-poethepoet<0.30
+poethepoet<0.31
 ruff<0.8