Changelog for language updates

CHANGELOG.md

@@ -5,6 +5,10 @@
 ### Thank you
  * [Joey Marianer (@jmarianer)](https://github.com/jmarianer): Support literal interpolated strings ($@"") [PR monaco-languages#12](https://github.com/Microsoft/monaco-languages/pull/13)
 -->
+  - CSS/JSON/HTML language supports updated:
+    - CSS: Support for @apply
+    - SCSS: Map support
+    - New HTML formatter options: unformatedContent, wrapAttributes
 
 ## [0.8.0]
  - This release has been brewing for a while and comes with quite a number of important changes.