fix exchange version (#75)

README-CN.md

@@ -1,11 +1,11 @@
-# 欢迎使用 Nebula Exchange 2.0         
+# 欢迎使用 Nebula Exchange
 [English](https://github.com/vesoft-inc/nebula-exchange/blob/master/README.md)
 
-Nebula Exchange 2.0（简称为 Exchange 2.0）是一款 Apache Spark™ 应用，用于在分布式环境中将集群中的数据批量迁移到 Nebula Graph 中，能支持多种不同格式的批式数据和流式数据的迁移。
+Nebula Exchange（简称为 Exchange）是一款 Apache Spark™ 应用，用于在分布式环境中将集群中的数据批量迁移到 Nebula Graph 中，能支持多种不同格式的批式数据和流式数据的迁移。
 
-Exchange 2.0 仅支持 Nebula Graph 2.x。
+Exchange 仅支持 Nebula Graph 2.x 和 3.x。
 
-如果您正在使用 Nebula Graph v1.x，请使用 [Nebula Exchange v1.0](https://github.com/vesoft-inc/nebula-java/tree/v1.0/tools/exchange) ，或参考 Exchange 1.0 的使用文档[《Nebula Exchange 用户手册》](https://docs.nebula-graph.com.cn/nebula-exchange/about-exchange/ex-ug-what-is-exchange/ "点击前往 Nebula Graph 网站")。
+如果您正在使用 Nebula Graph v1.x，请使用 [Nebula Exchange v1.0](https://github.com/vesoft-inc/nebula-java/tree/v1.0/tools/exchange) ，或参考 Exchange 1.0 的使用文档[Nebula Exchange 用户手册](https://docs.nebula-graph.com.cn/nebula-exchange/about-exchange/ex-ug-what-is-exchange/ "点击前往 Nebula Graph 网站")。
 
 Exchange 目前支持 Spark 2.2， Spark 2.4， Spark 3.0， 对应的工具包名分别是 nebula-exchange_spark_2.2，nebula-exchange_spark_2.4，nebula-exchange_spark_3.0。
 

README.md

@@ -1,9 +1,11 @@
-# Nebula Exchange 2.0
+# Nebula Exchange
  [中文版](https://github.com/vesoft-inc/nebula-exchange/blob/master/README-CN.md)
 
 Nebula Exchange (Exchange for short) is an Apache Spark application. It is used to migrate cluster data in bulk from Spark to Nebula Graph in a distributed environment. It supports migration of batch data and streaming data in various formats.
 
-Exchange 2.0 only supports Nebula Graph 2.0 . If you want to import data for Nebula Graph v1.x，please use [Nebula Exchange v1.0](https://github.com/vesoft-inc/nebula-java/tree/v1.0/tools/exchange).
+Exchange only supports Nebula Graph 2.x and 3.x.
+
+If you want to import data for Nebula Graph v1.x，please use [Nebula Exchange v1.0](https://github.com/vesoft-inc/nebula-java/tree/v1.0/tools/exchange).
 
 Exchange currently supports spark2.2, spark2.4 and spark3.0, and the corresponding toolkits are nebula-exchange_spark_2.2,  nebula-exchange_spark_2.4, nebula-exchange_spark_3.0.