build(deps): bump braze-specification from 476921d to e3340ba

Bumps [braze-specification](https://github.com/braze-community/braze-specification) from `476921d` to `e3340ba`.
- [Release notes](https://github.com/braze-community/braze-specification/releases)
- [Commits](braze-community/braze-specification@476921d...e3340ba)

---
updated-dependencies:
- dependency-name: braze-specification
  dependency-type: direct:production
...

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