Bump src/deps/Imath from 443b7f0 to 5d1792d

Bumps [src/deps/Imath](https://github.com/AcademySoftwareFoundation/Imath) from `443b7f0` to `5d1792d`.
- [Release notes](https://github.com/AcademySoftwareFoundation/Imath/releases)
- [Commits](AcademySoftwareFoundation/Imath@443b7f0...5d1792d)

---
updated-dependencies:
- dependency-name: src/deps/Imath
  dependency-type: direct:production
...

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