Updated CHANGELOG.txt

diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index d5822da..a954ec9 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -5,6 +5,7 @@ v1.19 (UNRELEASED)
 - Added Ampere Addon Control Panel to UI Buttons
 - Fixed wrong rested percent with cur-percent mode of experience bar
 - Added new options for loot history frame
+- Add ability to show Raid Markers only in the instance.

 v1.18 (October 9, 2012)
 - Fixed red flying could not showing in the mount list