chore: Bump loader-utils, @docusaurus/core, @docusaurus/preset-classic and @docusaurus/theme-search-algolia

Bumps [loader-utils](https://github.com/webpack/loader-utils) to 2.0.4 and updates ancestor dependencies [loader-utils](https://github.com/webpack/loader-utils), [@docusaurus/core](https://github.com/facebook/docusaurus/tree/HEAD/packages/docusaurus), [@docusaurus/preset-classic](https://github.com/facebook/docusaurus/tree/HEAD/packages/docusaurus-preset-classic) and [@docusaurus/theme-search-algolia](https://github.com/facebook/docusaurus/tree/HEAD/packages/docusaurus-theme-search-algolia). These dependencies need to be updated together.


Updates `loader-utils` from 2.0.0 to 2.0.4
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/v2.0.4/CHANGELOG.md)
- [Commits](webpack/loader-utils@v2.0.0...v2.0.4)

Updates `@docusaurus/core` from 2.0.0-beta.6 to 2.2.0
- [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/v2.2.0/packages/docusaurus)

Updates `@docusaurus/preset-classic` from 2.0.0-beta.6 to 2.2.0
- [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/v2.2.0/packages/docusaurus-preset-classic)

Updates `@docusaurus/theme-search-algolia` from 2.0.0-beta.6 to 2.2.0
- [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/v2.2.0/packages/docusaurus-theme-search-algolia)

---
updated-dependencies:
- dependency-name: loader-utils
  dependency-type: indirect
- dependency-name: "@docusaurus/core"
  dependency-type: direct:production
- dependency-name: "@docusaurus/preset-classic"
  dependency-type: direct:production
- dependency-name: "@docusaurus/theme-search-algolia"
  dependency-type: direct:production
...

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Author: dependabot[bot]