Update mdx-include requirement from <2.0.0,>=1.4.1 to >=1.4.2,<2.0.0

Updates the requirements on [mdx-include](https://github.com/neurobin/mdx_include) to permit the latest version.
- [Commits](neurobin/mdx_include@v1.4.2...v1.4.2)

---
updated-dependencies:
- dependency-name: mdx-include
  dependency-version: 1.4.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements-docs.txt

@@ -1,5 +1,5 @@
 markdown-include
-mdx-include >=1.4.1,<2.0.0
+mdx-include >=1.4.2,<2.0.0
 mkdocs >=1.1.2,<2.0.0
 mkdocs-markdownextradata-plugin >=0.2.6,<0.3.0
 mkdocs-material