Update the changelog

Author: khaykov

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Changelog
 
-## [Unreleased]
+
+## [1.0-beta.10](https://github.com/wordpress-mobile/AztecEditor-Android/releases/tag/v1.0-beta.10) - 2017-10-06
 ### Fixed
 - crash when HTML tags contained special regex characters ('$' or '\\')
 
@@ -182,4 +183,4 @@
 - More & page special tags
 - Hidden tags (`div`, `span`)
 - Unknown HTML (replaced with a question mark in visual mode)
-- Emojis
+- Emojis