Skip incorrect test

Author: roji

test/EFCore.PG.FunctionalTests/Query/QueryNpgsqlTest.cs

@@ -21,6 +21,9 @@ public override void OrderBy_coalesce_skip_take_distinct_take() { }
         [Fact(Skip = "Support in PG only for numerics")]
         public override void Where_math_log_new_base() { }
 
+        [Fact(Skip = "https://github.com/aspnet/EntityFrameworkCore/pull/10352")]
+        public override void DefaultIfEmpty_in_subquery_nested() {}
+
         #region Inherited
 
         public override void String_Contains_Literal()