Fixed taaFrameIndex in edit mode

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Camera/HDCamera.cs

                 isFirstFrame = false;
             }
 
-            const uint taaFrameCount = 8;
-            taaFrameIndex = taaEnabled ? (uint)Time.renderedFrameCount % taaFrameCount : 0;
+            taaFrameIndex = taaEnabled ? (uint)postProcessLayer.temporalAntialiasing.sampleIndex : 0;
             taaFrameRotation = new Vector2(Mathf.Sin(taaFrameIndex * (0.5f * Mathf.PI)),
                                            Mathf.Cos(taaFrameIndex * (0.5f * Mathf.PI)));