Bump katex and micromark-extension-math in /docs

Bumps [katex](https://github.com/KaTeX/KaTeX) and [micromark-extension-math](https://github.com/micromark/micromark-extension-math). These dependencies needed to be updated together.

Updates `katex` from 0.16.9 to 0.16.10
- [Release notes](https://github.com/KaTeX/KaTeX/releases)
- [Changelog](https://github.com/KaTeX/KaTeX/blob/main/CHANGELOG.md)
- [Commits](KaTeX/KaTeX@v0.16.9...v0.16.10)

Updates `micromark-extension-math` from 2.0.2 to 2.1.2
- [Release notes](https://github.com/micromark/micromark-extension-math/releases)
- [Commits](micromark/micromark-extension-math@2.0.2...2.1.2)

---
updated-dependencies:
- dependency-name: katex
  dependency-type: indirect
- dependency-name: micromark-extension-math
  dependency-type: indirect
...

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

Author: dependabot[bot]