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

Updates the requirements on [markupsafe](https://github.com/pallets/markupsafe) to permit the latest version.
- [Release notes](https://github.com/pallets/markupsafe/releases)
- [Changelog](https://github.com/pallets/markupsafe/blob/main/CHANGES.rst)
- [Commits](pallets/markupsafe@0.9...3.0.1)

---
updated-dependencies:
- dependency-name: markupsafe
  dependency-type: direct:production
...

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

Author: dependabot[bot]

python-flask/pyproject.toml

@@ -11,7 +11,7 @@ dependencies = [
   "flask-cors<5",
   "itsdangerous<3",
   "jinja2<4",
-  "markupsafe<3",
+  "markupsafe<4",
 ]
 
 [tool.poe.tasks]