Bump adapt-authoring-testing from 6c96d43 to a0999a0

Bumps [adapt-authoring-testing](https://github.com/adapt-security/adapt-authoring-testing) from `6c96d43` to `a0999a0`.
- [Commits](adapt-security/adapt-authoring-testing@6c96d43...a0999a0)

---
updated-dependencies:
- dependency-name: adapt-authoring-testing
  dependency-type: direct:development
...

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