Change the source value for the ray tracing frame index iterator from m_FrameCount to the camera frame count (case 1301356). (#3032)

Co-authored-by: sebastienlagarde <sebastien@unity3d.com>

Author: 2 people

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -47,6 +47,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Change Assets/Create/Rendering/C# Custom Pass to Assets/Create/Rendering/HDRP C# Custom Pass
 - Change Assets/Create/Rendering/C# Post Process Volume to Assets/Create/Rendering/HDRP C# Post Process Volume
 
+### Changed
+- Change the source value for the ray tracing frame index iterator from m_FrameCount to the camera frame count (case 1301356).
+
 ## [11.0.0] - 2020-10-21
 
 ### Added