message: Update RELEASE_NOTES for 1.12.2
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.
  -## v1.12.3 (currently main branch)
  +## v1.12.4 (currently main branch)
  -## v1.12.2
  +## v1.12.3
  - engine: Support AMD FidelityFX Super Resolution for dynamic resolution scaling
  +## v1.12.2
  +
  +- engine: New API on `ColorGrading` to enable or disable gamut mapping at will [**New Api**].
  +- engine: Fix typo causing ShadowOptions::shadowFar to not work properly.
  +- engine: Fix, CSM glitch when using shadowMultiplier materials.
  +- engine: Improve precision when computing camera projection.
  +- engine: Increase the number of supported spot shadows to 14 (from 6).
  +- Metal: Add texture swizzling support for external textures.
  +
  ## v1.12.1
  - engine: `double` precision translation support in TransformManager. Disabled by default.
  