Bump OpenTimelineIO from 4440afa to 30f6f56

Bumps [OpenTimelineIO](https://github.com/PixarAnimationStudios/OpenTimelineIO) from `4440afa` to `30f6f56`.
- [Release notes](https://github.com/PixarAnimationStudios/OpenTimelineIO/releases)
- [Commits](AcademySoftwareFoundation/OpenTimelineIO@4440afa...30f6f56)

---
updated-dependencies:
- dependency-name: OpenTimelineIO
  dependency-version: 30f6f569c7abde6d0ce11bbe93607b6e3d44a8fb
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]