Merge branch 'codezhang-dev' into 'master'

修改readme

See merge request esl_ipdd/ucloud-sdk-java!67

Author: jianhui.zhang

README.md

@@ -200,5 +200,5 @@ public class Main {
 
 - 0.8.4.0-release
 
-    新增业务模块Ucdn
+    新增业务模块UCDN