Fix date of 4.21.0 release

CHANGELOG.md

@@ -1,8 +1,7 @@
 # Changelog
 All changes to the project will be documented in this file.
 
-## 4.21.1 - 01 Jan 2018
-
+### 4.21.1 - 27 Jan 2018
 - Release page
 - OpenID Connect support
 - New database viewer
@@ -10,7 +9,6 @@ All changes to the project will be documented in this file.
 - Clarify close/reopen button
 
 ## 4.20.0 - 23 Dec 2017
-
 - Squash and rebase merge strategy for pull requests
 - Quick pull request creation
 - Download patch from the diff view
@@ -21,17 +19,14 @@ All changes to the project will be documented in this file.
 - Display conflicting files if pull request can't be merged
 
 ## 4.19.3 - 7 Dec 2017
-
 - Fix file uploading bug
 - Fix reply comment form behavior in the diff view
 
 ## 4.19.2 - 3 Dec 2017
-
 - Fix routing bug in `CompositeScalatraFilter`
 - Resolve id attribute collision in the web hook editing form
 
 ## 4.19.1 - 2 Dec 2017
-
 - Update gitbucket-notifications-plugin because it had a version compatibility issue
 
 ## 4.19.0 - 2 Dec 2017

README.md

@@ -68,11 +68,10 @@ Support
 - If you can't find same question and report, send it to [gitter room](https://gitter.im/gitbucket/gitbucket) before raising an issue.
 - The highest priority of GitBucket is the ease of installation and API compatibility with GitHub, so your feature request might be rejected if they go against those principles.
 
-What's New in 4.20.x
+What's New in 4.21.x
 -------------
 
-### 4.21.1 - 01 Jan 2018
-
+### 4.21.1 - 27 Jan 2018
 - Release page
 - OpenID Connect support
 - New database viewer