Perform camera scaling in OnPreCull, instead of OnPreRender.

Fixed compatibility with post-FX executing OnPreRender before FSR2, and which retrieve camera resolution values to perform their rendering. For example: HBAO.

Assets/Scripts/Fsr2Controller.cs

@@ -164,7 +164,7 @@ namespace FidelityFX
             _reset = true;
         }
 
-        private void OnPreRender()
+        private void OnPreCull()
         {
             // Render to a smaller portion of the screen by manipulating the camera's viewport rect
             _originalRect = _renderCamera.rect;