Fix the wrong comments. (#4139)

oap-server/server-library/library-client/src/main/java/org/apache/skywalking/oap/server/library/client/jdbc/hikaricp/JDBCHikariCPClient.java

@@ -48,7 +48,7 @@ public class JDBCHikariCPClient implements Client {
     }
 
     /**
-     * Default getConnection is not set in auto-commit.
+     * Default getConnection is set in auto-commit.
      *
      * @return
      * @throws JDBCClientException