Bump marshmallow from 3.20.1 to 3.20.2

Bumps [marshmallow](https://github.com/marshmallow-code/marshmallow) from 3.20.1 to 3.20.2.
- [Changelog](https://github.com/marshmallow-code/marshmallow/blob/dev/CHANGELOG.rst)
- [Commits](marshmallow-code/marshmallow@3.20.1...3.20.2)

---
updated-dependencies:
- dependency-name: marshmallow
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

setup.py

@@ -9,7 +9,7 @@
         "coverage==7.4.0",
         "werkzeug==3.0.1",
         "flask==3.0.0",
-        "marshmallow==3.20.1",
+        "marshmallow==3.20.2",
         "webargs==8.4.0",
         "apispec==6.3.1",
         "PyYAML==6.0.1",