chore: bump fast-xml-parser and is-svg in /docs (#394)

Bumps [fast-xml-parser](https://github.com/NaturalIntelligence/fast-xml-parser) and [is-svg](https://github.com/sindresorhus/is-svg). These dependencies needed 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 `is-svg` from 4.3.2 to 4.4.0
- [Release notes](https://github.com/sindresorhus/is-svg/releases)
- [Commits](sindresorhus/is-svg@v4.3.2...v4.4.0)

---
updated-dependencies:
- dependency-name: fast-xml-parser
  dependency-type: indirect
- dependency-name: is-svg
  dependency-type: indirect
...

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