Bump marshmallow from 3.23.1 to 3.26.1

Bumps [marshmallow](https://github.com/marshmallow-code/marshmallow) from 3.23.1 to 3.26.1.
- [Changelog](https://github.com/marshmallow-code/marshmallow/blob/dev/CHANGELOG.rst)
- [Commits](marshmallow-code/marshmallow@3.23.1...3.26.1)

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

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

Author: dependabot[bot]

requirements.txt

@@ -27,7 +27,7 @@ langchain-openai==0.2.9
 langchain-text-splitters==0.3.5
 langsmith==0.3.1
 markdown-it-py==3.0.0
-marshmallow==3.23.1
+marshmallow==3.26.1
 mdurl==0.1.2
 multidict==6.1.0
 mypy-extensions==1.0.0