Docs: updates changelog

Author: mindline-analytics

docs/changes/1.0.0.md

@@ -17,6 +17,8 @@
 - PowerPoint2007 Reader : Load images in their initial format (and not by default in PNG) - [@polidog](https://github.com/polidog) GH-553
 
 ## Features
+- Support for bar overlap in 2D bar charts - [@mindline](https://github.com/mindline-analytics) GH-667
+    - PowerPoint2007 Writer
 - Support for the position of Legend in ODPresentation Writer - [@Progi1984](https://github.com/Progi1984) GH-355
 - Support for DoughnutChart - [@Progi1984](https://github.com/Progi1984) GH-355
     - ODPresentation Writer
@@ -102,4 +104,4 @@
 * `PhpOffice\PhpPresentation\Writer\PowerPoint2007\LayoutPack\PackDefault`
     * Removed class
 * `PhpOffice\PhpPresentation\Writer\PowerPoint2007\LayoutPack\TemplateBased`
-    * Removed class
+    * Removed class