fix: modify sample test case that sample is not supported with fill

tests/system-test/2-query/sample.py

@@ -515,7 +515,7 @@ class TDTestCase:
         #     "condition": "where ts>0 and ts < now interval(1h) fill(next)"
         # }
         # self.checksample(**err45)         # interval
-        tdSql.query("select sample( c1 , 1 )  from t1 where ts>0 and ts < now interval(1h) fill(next)")
+        tdSql.error("select sample( c1 , 1 )  from t1 where ts>0 and ts < now interval(1h) fill(next)")
         err46 = {
             "table_expr": "t1",
             "condition": "group by c6"