Safely set result on s_editorObjectReady

As it can fail if the editor is being re-initialized.

Author: andyleejordan

src/PowerShellEditorServices/Extensions/EditorObject.cs

@@ -137,7 +137,7 @@ public EditorContext GetEditorContext()
         internal void SetAsStaticInstance()
         {
             EditorObject.Instance = this;
-            s_editorObjectReady.SetResult(true);
+            s_editorObjectReady.TrySetResult(true);
         }
     }
 }