build(deps): bump third-party/FFmpeg/AMF from 16f7d73 to afed28d (#527)

Bumps [third-party/FFmpeg/AMF](https://github.com/GPUOpen-LibrariesAndSDKs/AMF) from `16f7d73` to `afed28d`.
- [Release notes](https://github.com/GPUOpen-LibrariesAndSDKs/AMF/releases)
- [Commits](GPUOpen-LibrariesAndSDKs/AMF@16f7d73...afed28d)

---
updated-dependencies:
- dependency-name: third-party/FFmpeg/AMF
  dependency-version: afed28d37aca1938da2eedc50599bb3535a987ec
  dependency-type: direct:production
...

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