Change Gizmo6FacesBox namespace

com.unity.render-pipelines.core/CoreRP/Tool/Gizmo6FacesBox.cs

 using UnityEditor;
 using System.Reflection;
 
-namespace UnityEngine.Experimental.Gizmo
+namespace UnityEngine.Experimental.Rendering
 {
     public class Gizmo6FacesBox
     {

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/Reflection/HDReflectionProbeEditor.Handles.cs

 using UnityEngine.Experimental.Rendering;
 using UnityEngine.Experimental.Rendering.HDPipeline;
 using UnityEngine.Rendering;
-using UnityEngine.Experimental.Gizmo;
+using UnityEngine.Experimental.Rendering;
 
 namespace UnityEditor.Experimental.Rendering
 {

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/Reflection/HDReflectionProbeUI.cs

 using UnityEngine.Experimental.Rendering;
 using UnityEngine.Experimental.Rendering.HDPipeline;
 using UnityEngine.Rendering;
-using UnityEngine.Experimental.Gizmo;
+using UnityEngine.Experimental.Rendering;
 
 namespace UnityEditor.Experimental.Rendering
 {

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/Reflection/Volume/InfluenceVolumeUI.Gizmos.cs

 using System;
 using UnityEngine;
 using UnityEngine.Experimental.Rendering.HDPipeline;
-using UnityEngine.Experimental.Gizmo;
+using UnityEngine.Experimental.Rendering;
 
 namespace UnityEditor.Experimental.Rendering.HDPipeline
 {

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/Reflection/Volume/InfluenceVolumeUI.Handles.cs

 using UnityEngine;
 using UnityEngine.Experimental.Rendering.HDPipeline;
 using Object = UnityEngine.Object;
-using UnityEngine.Experimental.Gizmo;
+using UnityEngine.Experimental.Rendering;
 
 namespace UnityEditor.Experimental.Rendering.HDPipeline
 {

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/Reflection/Volume/InfluenceVolumeUI.cs

 using UnityEditor.IMGUI.Controls;
 using UnityEngine;
 using UnityEngine.Experimental.Rendering.HDPipeline;
-using UnityEngine.Experimental.Gizmo;
+using UnityEngine.Experimental.Rendering;
 
 namespace UnityEditor.Experimental.Rendering.HDPipeline
 {