docs: Update CHANGELOG file

CHANGELOG.md

@@ -4,7 +4,6 @@ All notable changes to this project will be documented in this file. See [standa
 
 ## [1.0.0-alpha.0](https://github.com/liuyib/hexo-theme-stun/compare/v1.0.0-beta.0...v1.0.0-alpha.0) (2019-06-17)
 
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 ### Bug Fixes
 
 * Display the reading progress bar only on the articles page ([cdaac3f](https://github.com/liuyib/hexo-theme-stun/commit/cdaac3f))
@@ -12,7 +11,6 @@ All notable changes to this project will be documented in this file. See [standa
 * Resolve read progress error, since post height equal zero ([cc1b6fa](https://github.com/liuyib/hexo-theme-stun/commit/cc1b6fa))
 * Solve the problem of sidebar jumping ([6933c40](https://github.com/liuyib/hexo-theme-stun/commit/6933c40))
 
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 ### Features
 
 * Add back to top button ([9248c62](https://github.com/liuyib/hexo-theme-stun/commit/9248c62))
@@ -24,8 +22,6 @@ All notable changes to this project will be documented in this file. See [standa
 * Add the hyperlink to post title ([2d4089c](https://github.com/liuyib/hexo-theme-stun/commit/2d4089c))
 * Add word count & reading time cout of post ([b0c34df](https://github.com/liuyib/hexo-theme-stun/commit/b0c34df))
 
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 ## 1.0.0-beta.0 (2019-06-03)
 
 ### Bug Fixes