Bump OpenTimelineIO from 4440afa to a71b292

Bumps [OpenTimelineIO](https://github.com/PixarAnimationStudios/OpenTimelineIO) from `4440afa` to `a71b292`.
- [Release notes](https://github.com/PixarAnimationStudios/OpenTimelineIO/releases)
- [Commits](AcademySoftwareFoundation/OpenTimelineIO@4440afa...a71b292)

---
updated-dependencies:
- dependency-name: OpenTimelineIO
  dependency-version: a71b2927cc8378bcb803a84a40740ef732e0cfc9
  dependency-type: direct:production
...

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Author: dependabot[bot]