chore(deps): bump fast-xml-parser in /functions/functions

Bumps [fast-xml-parser](https://github.com/NaturalIntelligence/fast-xml-parser) from 5.4.2 to 5.5.7.
- [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@v5.4.2...v5.5.7)

---
updated-dependencies:
- dependency-name: fast-xml-parser
  dependency-version: 5.5.7
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]