Bump @rocket.chat/string-helpers in /ee/server/services (#25018)

Bumps [@rocket.chat/string-helpers](https://github.com/RocketChat/Rocket.Chat.Fuselage/tree/HEAD/packages/string-helpers) from 0.31.4 to 0.31.9.
- [Release notes](https://github.com/RocketChat/Rocket.Chat.Fuselage/releases)
- [Changelog](https://github.com/RocketChat/Rocket.Chat.Fuselage/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/RocketChat/Rocket.Chat.Fuselage/commits/v0.31.9/packages/string-helpers

)

---
updated-dependencies:
- dependency-name: "@rocket.chat/string-helpers"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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