deps: bump the dependency-updates group with 2 updates

Bumps the dependency-updates group with 2 updates: [@mdx-js/mdx](https://github.com/mdx-js/mdx/tree/HEAD/packages/mdx) and [@mdx-js/react](https://github.com/mdx-js/mdx/tree/HEAD/packages/react).


Updates `@mdx-js/mdx` from 3.0.1 to 3.1.0
- [Release notes](https://github.com/mdx-js/mdx/releases)
- [Changelog](https://github.com/mdx-js/mdx/blob/main/changelog.md)
- [Commits](https://github.com/mdx-js/mdx/commits/3.1.0/packages/mdx)

Updates `@mdx-js/react` from 3.0.1 to 3.1.0
- [Release notes](https://github.com/mdx-js/mdx/releases)
- [Changelog](https://github.com/mdx-js/mdx/blob/main/changelog.md)
- [Commits](https://github.com/mdx-js/mdx/commits/3.1.0/packages/react)

---
updated-dependencies:
- dependency-name: "@mdx-js/mdx"
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependency-updates
- dependency-name: "@mdx-js/react"
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependency-updates
...

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

Author: dependabot[bot]