translate sharding-scaling README.md document to chinese (#4909)
translate sharding-scaling README.md document to chinese (#4909)

* translate sharding-scaling README.md document to chinese

* optimise some concept for sharding-scaling README.md document translation
apache/incubator-shardingsphere,leeyazhou/sharding-jdbc,apache/incubator-shardingsphere,leeyazhou/sharding-jdbc,leeyazhou/sharding-jdbc,apache/incubator-shardingsphere,leeyazhou/sharding-jdbc,apache/incubator-shardingsphere