Bump marshmallow from 3.26.1 to 3.26.2

Bumps [marshmallow](https://github.com/marshmallow-code/marshmallow) from 3.26.1 to 3.26.2.
- [Changelog](https://github.com/marshmallow-code/marshmallow/blob/3.26.2/CHANGELOG.rst)
- [Commits](https://github.com/marshmallow-code/marshmallow/compare/3.26.1...3.26.2)

---
updated-dependencies:
- dependency-name: marshmallow
  dependency-version: 3.26.2
  dependency-type: indirect
...

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

requirements.txt

@@ -28,7 +28,7 @@ idna==3.10
     # via
     #   anyio
     #   requests
-marshmallow==3.26.1
+marshmallow==3.26.2
     # via platformio
 packaging==24.2
     # via marshmallow