update log [ci skip]

Author: longbai

CHANGELOG.md

@@ -2,14 +2,14 @@
 
 ### v6.1.5
 
-2014-4-03 issue [#111](https://github.com/qiniu/nodejs-sdk/pull/111)
+2014-7-23 issue [#111](https://github.com/qiniu/nodejs-sdk/pull/111)
 
 - [#109] 统一user agent
 - [#110] 更新put policy
 
 ### v6.1.4
 
-2014-4-03 issue [#108](https://github.com/qiniu/nodejs-sdk/pull/108)
+2014-7-10 issue [#108](https://github.com/qiniu/nodejs-sdk/pull/108)
 
 - [#107] 调整上传host