chore(deps): update flask-cors requirement in /store/backend (#1144)

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@4.0.0...6.0.1)

---
updated-dependencies:
- dependency-name: flask-cors
  dependency-version: 6.0.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

store/backend/pyproject.toml

@@ -15,7 +15,7 @@ dependencies = [
     "authlib~=1.6",
     "connexion[swagger-ui,uvicorn,flask]==3.0.0",
     "flask~=3.1",
-    "flask-cors~=4.0",
+    "flask-cors~=6.0",
     "flask-caching~=2.0",
     "flask-shell-ipython~=0.4",
     "flask-migrate~=4.1",