Added missing todo

ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.cs

 
                 using (new ProfilingSample(cmd, "Volume Update", GetSampler(CustomSamplerId.VolumeUpdate)))
                 {
+                    // TODO: Transform & layer should be configurable per camera
                     VolumeManager.instance.Update(camera.transform, -1);
                 }
             }