message: Update RELEASE_NOTES for 1.12.3
diff: This file contains one line summaries of commits that are worthy of mentioning in release notes.
  A new header is inserted each time a *tag* is created.
  -## v1.12.4 (currently main branch)
  +## v1.12.5 (currently main branch)
  +
  +## v1.12.4
  - engine: New night adaptation API on `ColorGrading`. This API can be used to create an effect that
  that simulates color and brightness shifts in human vision in low-light conditions.
  