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

Updates the requirements on [flask-cors](https://github.com/corydolphin/flask-cors) to permit the latest version.
- [Release notes](https://github.com/corydolphin/flask-cors/releases)
- [Changelog](https://github.com/corydolphin/flask-cors/blob/main/CHANGELOG.md)
- [Commits](corydolphin/flask-cors@v1.0.0a...5.0.0)

---
updated-dependencies:
- dependency-name: flask-cors
  dependency-type: direct:production
...

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

Author: dependabot[bot]

python-flask/pyproject.toml

@@ -8,7 +8,7 @@ dependencies = [
   "crate",
   "flask<3",
   "flask-restful<1",
-  "flask-cors<5",
+  "flask-cors<6",
   "itsdangerous<3",
   "jinja2<4",
   "markupsafe<4",