Bump marshmallow from 3.20.1 to 3.26.2

Bumps [marshmallow](https://github.com/marshmallow-code/marshmallow) from 3.20.1 to 3.26.2.
- [Changelog](https://github.com/marshmallow-code/marshmallow/blob/3.26.2/CHANGELOG.rst)
- [Commits](marshmallow-code/marshmallow@3.20.1...3.26.2)

---
updated-dependencies:
- dependency-name: marshmallow
  dependency-version: 3.26.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Pipfile

@@ -19,7 +19,7 @@ gevent-websocket = "==0.10.1"
 gitignore-parser = "==0.1.1"
 kthread = "==0.2.3"
 markdown = "==3.6"
-marshmallow = "==3.20.1"
+marshmallow = "==3.26.2"
 networkx = "==2.6"
 numpy = "<2.0.0"
 openpyxl = "==3.1.2"