Fix workspace ui panel after workspace API change

This was broken since e8c15e0ed1. We can no longer get view_layer
from worspace, we should get it from window instead, now.

release/scripts/startup/bl_ui/properties_data_workspace.py

@@ -48,13 +48,14 @@ class WORKSPACE_PT_workspace(WorkSpaceButtonsPanel, Panel):
     def draw(self, context):
         layout = self.layout
 
+        window = context.window
         workspace = context.workspace
         scene = context.scene
         view_render = workspace.view_render
 
         layout.enabled = not workspace.use_scene_settings
 
-        layout.template_search(workspace, "view_layer", scene, "view_layers")
+        layout.template_search(window, "view_layer", scene, "view_layers")
 
         if view_render.has_multiple_engines:
             layout.prop(view_render, "engine", text="")