Update comment and fix instancing

com.unity.render-pipelines.core/CoreRP/ShaderLibrary/UnityInstancing.hlsl

 
     #undef UNITY_MATRIX_M
     #ifdef MODIFY_MATRIX_FOR_CAMERA_RELATIVE_RENDERING
-    #define UNITY_MATRIX_M  ApplyPreCameraTranslationToMatrix(UNITY_ACCESS_INSTANCED_PROP(unity_Builtins0, unity_ObjectToWorldArray))
+    #define UNITY_MATRIX_M  ApplyCameraTranslationToMatrix(UNITY_ACCESS_INSTANCED_PROP(unity_Builtins0, unity_ObjectToWorldArray))
     #else
     #define UNITY_MATRIX_M  UNITY_ACCESS_INSTANCED_PROP(unity_Builtins0, unity_ObjectToWorldArray)
     #endif
     #undef UNITY_MATRIX_I_M
     #ifdef MODIFY_MATRIX_FOR_CAMERA_RELATIVE_RENDERING
-    #define UNITY_MATRIX_I_M    ApplyPreCameraTranslationToInverseMatrix(UNITY_ACCESS_INSTANCED_PROP(MERGE_UNITY_BUILTINS_INDEX(UNITY_WORLDTOOBJECTARRAY_CB), unity_WorldToObjectArray))
+    #define UNITY_MATRIX_I_M    ApplyCameraTranslationToInverseMatrix(UNITY_ACCESS_INSTANCED_PROP(MERGE_UNITY_BUILTINS_INDEX(UNITY_WORLDTOOBJECTARRAY_CB), unity_WorldToObjectArray))
     #else
     #define UNITY_MATRIX_I_M    UNITY_ACCESS_INSTANCED_PROP(MERGE_UNITY_BUILTINS_INDEX(UNITY_WORLDTOOBJECTARRAY_CB), unity_WorldToObjectArray)
     #endif

com.unity.render-pipelines.high-definition/HDRP/ShaderVariablesFunctions.hlsl

 #ifndef UNITY_SHADER_VARIABLES_FUNCTIONS_INCLUDED
 #define UNITY_SHADER_VARIABLES_FUNCTIONS_INCLUDED
 
-// This function always return the absolute position in WS either the CameraRelative mode is enabled or not
+// This function always return the absolute position in WS
 float3 GetAbsolutePositionWS(float3 positionRWS)
 {
 #if (SHADEROPTIONS_CAMERA_RELATIVE_RENDERING != 0)
 }
 
-// This function always return the camera relative position in WS either the CameraRelative mode is enabled or not
+// This function return the camera relative position in WS
 float3 GetCameraRelativePositionWS(float3 positionWS)
 {
 #if (SHADEROPTIONS_CAMERA_RELATIVE_RENDERING != 0)