update changelog

Author: troosan

CHANGELOG.md

@@ -18,6 +18,7 @@ This is the last version to support PHP 5.3
 - Support for Comments - @troosan #1067
 - Support for paragraph textAlignment - @troosan #1165
 - Add support for HTML underline tag <u> in addHtml - @zNightFalLz #1186
+- Add support for HTML <br> in addHtml - @anrikun @troosan #659
 - Allow to change cell width unit - guillaume-ro-fr #986
 - Allow to change the line height rule @troosan