Bump fast-xml-parser and openapi-sampler

Bumps [fast-xml-parser](https://github.com/NaturalIntelligence/fast-xml-parser) and [openapi-sampler](https://github.com/Redocly/openapi-sampler). These dependencies needed to be updated together.

Updates `fast-xml-parser` from 4.5.4 to 5.5.6
- [Release notes](https://github.com/NaturalIntelligence/fast-xml-parser/releases)
- [Changelog](https://github.com/NaturalIntelligence/fast-xml-parser/blob/master/CHANGELOG.md)
- [Commits](NaturalIntelligence/fast-xml-parser@v4.5.4...v5.5.6)

Updates `openapi-sampler` from 1.6.2 to 1.7.2
- [Release notes](https://github.com/Redocly/openapi-sampler/releases)
- [Changelog](https://github.com/Redocly/openapi-sampler/blob/main/CHANGELOG.md)
- [Commits](https://github.com/Redocly/openapi-sampler/commits/v1.7.2)

---
updated-dependencies:
- dependency-name: fast-xml-parser
  dependency-version: 5.5.6
  dependency-type: indirect
- dependency-name: openapi-sampler
  dependency-version: 1.7.2
  dependency-type: indirect
...

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Author: dependabot[bot]