Fixed custom probe cubemap

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

             legacyBlendDistance.floatValue = 0;
         }
 
-        public new void Apply()
+        internal override void Apply()
         {
             serializedLegacyObject.ApplyModifiedProperties();
             serializedObject.ApplyModifiedProperties();