Bump fast-xml-parser and astro

Bumps [fast-xml-parser](https://github.com/NaturalIntelligence/fast-xml-parser) to 4.2.4 and updates ancestor dependency [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro). These dependencies need to be updated together.


Updates `fast-xml-parser` from 3.21.1 to 4.2.4
- [Release notes](https://github.com/NaturalIntelligence/fast-xml-parser/releases)
- [Changelog](https://github.com/NaturalIntelligence/fast-xml-parser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/NaturalIntelligence/fast-xml-parser/commits)

Updates `astro` from 0.21.4 to 0.21.13
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/astro@0.21.13/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/astro@0.21.13/packages/astro)

---
updated-dependencies:
- dependency-name: fast-xml-parser
  dependency-type: indirect
- dependency-name: astro
  dependency-type: direct:development
...

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Author: dependabot[bot]