fix infinite migration

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

             mode = legacyProbe.mode;
             refreshMode = legacyProbe.refreshMode;
             m_Version = 2;
+            needMigrateToHDProbeChild = false;
             OnAfterDeserialize();   //continue migrating if needed
         }