Update mkdocs-jupyter requirement from >=0.25.1 to >=0.26.3 (#1319)

Updates the requirements on [mkdocs-jupyter](https://github.com/danielfrg/mkdocs-jupyter) to permit the latest version.
- [Changelog](https://github.com/danielfrg/mkdocs-jupyter/blob/main/CHANGELOG.md)
- [Commits](https://github.com/danielfrg/mkdocs-jupyter/commits)

---
updated-dependencies:
- dependency-name: mkdocs-jupyter
  dependency-version: 0.26.3
  dependency-type: direct:production
...

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Author: dependabot[bot]

requirements_docs.txt

@@ -9,7 +9,7 @@ livereload
 mkdocs
 mkdocs-git-revision-date-localized-plugin
 mkdocs-git-revision-date-plugin
-mkdocs-jupyter>=0.25.1
+mkdocs-jupyter>=0.26.3
 mkdocs-material>=9.1.3
 mkdocs-pdf-export-plugin
 mkdocstrings