Fix issue when "Domain unloader" wasn't found (renamed to "Domain Unloader")

Editor/ProfilerDataCollector.cs

@@ -61,7 +61,11 @@ namespace UnityEditor.EditorIterationProfiler
                 AddMarkerFlags(marker, EventDataFlags.UserCode);
             }
 
+#if UNITY_2020_3_OR_NEWER
+            AddThreadMarker("UnloadDomain", "Domain Unloader", "Finalizer");
+#else
             AddThreadMarker("UnloadDomain", "Domain unloader", "Finalizer");
+#endif
         }
 
         void Initialize(IIterationList iterationList)

Editor/UnityProfiling.cs

@@ -83,7 +83,7 @@ namespace UnityEditor.EditorIterationProfiler
             }
 
             iter.Dispose();
-            throw new ArgumentException($"Could not find thread named '{threadName}'");
+            throw new ArgumentException($"Could not find thread named '{threadName}'. Depending on the Unity version, it could have been renamed.");
         }
     }
 }