Bump js-yaml, @astrojs/mdx and astro (#72)

Bumps [js-yaml](https://github.com/nodeca/js-yaml) to 4.1.1 and updates ancestor dependencies [js-yaml](https://github.com/nodeca/js-yaml), [@astrojs/mdx](https://github.com/withastro/astro/tree/HEAD/packages/integrations/mdx) and [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro). These dependencies need to be updated together.


Updates `js-yaml` from 3.14.1 to 4.1.1
- [Changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md)
- [Commits](nodeca/js-yaml@3.14.1...4.1.1)

Updates `@astrojs/mdx` from 3.1.5 to 4.3.10
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/mdx/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/[email protected]/packages/integrations/mdx)

Updates `astro` from 4.16.19 to 5.15.7
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/[email protected]/packages/astro)

---
updated-dependencies:
- dependency-name: js-yaml
  dependency-version: 4.1.1
  dependency-type: indirect
- dependency-name: "@astrojs/mdx"
  dependency-version: 4.3.10
  dependency-type: direct:production
- dependency-name: astro
  dependency-version: 5.15.7
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]