Update Change Log

It took me a while to find it.

Author: oleibman

docs/changes/1.x/1.2.0.md

@@ -29,6 +29,7 @@
   - PDF Writer : Added support for PageBreak
   - PDF Writer : Added callback for modifying the HTML
   - Added Support for Language, both for document overall and individual text elements
+- Improve ODText Content Reader by [@oleibman](https://github.com/oleibman) in [#2507](https://github.com/PHPOffice/PHPWord/pull/2507)
 
 ### Bug fixes