fix：加载模型到内存时内存泄露bug (#1465)

* fix existSegment bug which embedding search not has min-score,so that it will return true.

headless/chat/src/main/java/com/tencent/supersonic/headless/chat/corrector/TimeCorrector.java

@@ -108,5 +108,4 @@ public class TimeCorrector extends BaseSemanticCorrector {
             semanticParseInfo.getSqlInfo().setCorrectedS2SQL(correctS2SQL);
         }
     }
-
-}
+}