Bump micromatch and @docusaurus/core in /website

Bumps [micromatch](https://github.com/micromatch/micromatch) to 4.0.8 and updates ancestor dependency [@docusaurus/core](https://github.com/facebook/docusaurus/tree/HEAD/packages/docusaurus). These dependencies need to be updated together.


Updates `micromatch` from 4.0.2 to 4.0.8
- [Release notes](https://github.com/micromatch/micromatch/releases)
- [Changelog](https://github.com/micromatch/micromatch/blob/master/CHANGELOG.md)
- [Commits](micromatch/micromatch@4.0.2...4.0.8)

Updates `@docusaurus/core` from 2.0.0-alpha.61 to 2.4.3
- [Release notes](https://github.com/facebook/docusaurus/releases)
- [Changelog](https://github.com/facebook/docusaurus/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/docusaurus/commits/v2.4.3/packages/docusaurus)

---
updated-dependencies:
- dependency-name: micromatch
  dependency-type: indirect
- dependency-name: "@docusaurus/core"
  dependency-type: direct:production
...

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