chore(deps): update marshmallow requirement in /store/backend

Updates the requirements on [marshmallow](https://github.com/marshmallow-code/marshmallow) to permit the latest version.
- [Changelog](https://github.com/marshmallow-code/marshmallow/blob/dev/CHANGELOG.rst)
- [Commits](marshmallow-code/marshmallow@3.0.0...4.0.0)

---
updated-dependencies:
- dependency-name: marshmallow
  dependency-version: 4.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

store/backend/pyproject.toml

@@ -21,7 +21,7 @@ dependencies = [
     "flask-sqlalchemy~=3.1", # fix multiple instance error: https://flask-sqlalchemy.palletsprojects.com/en/3.0.x/changes/#version-3-0-3
     "gunicorn~=23.0",
     "ipython~=7.19",
-    "marshmallow~=3.0",
+    "marshmallow~=4.0",
     "numpy<2.0.0",
     "pandas~=2.3",
     "psycopg2-binary~=2.8",