fix sky asserts with XR multipass (#1133)

Co-authored-by: sebastienlagarde <[email protected]>

Author: fabien-unity

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -720,6 +720,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed unitialized ray tracing resources when using non-default HDRP asset (case 1259467).
 - Fixed for area light not updating baked light result when modifying with gizmo.
 - Fixed overused the atlas for Animated/Render Target Cookies (1259930).
+- Fixed sky asserts with XR multipass
 
 ### Changed
 - Improve MIP selection for decals on Transparents

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.cs

@@ -1633,6 +1633,7 @@ protected override void Render(ScriptableRenderContext renderContext, Camera[] c
                                     cullingResults = req.cullingResults;
                                     skipClearCullingResults.Add(req.index);
                                     needCulling = false;
+                                    m_SkyManager.UpdateCurrentSkySettings(hdCamera);
                                 }
                             }
                         }