gateway: bump either from 1.13.0 to 1.14.0 in /gateway

Bumps [either](https://github.com/rayon-rs/either) from 1.13.0 to 1.14.0.
- [Commits](rayon-rs/either@1.13.0...1.14.0)

---
updated-dependencies:
- dependency-name: either
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]