Update changelog for OBR 2.0.6


git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1705307 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/bundlerepository/doc/changelog.txt b/bundlerepository/doc/changelog.txt
index 537c7a1..d2aa1eb 100644
--- a/bundlerepository/doc/changelog.txt
+++ b/bundlerepository/doc/changelog.txt
@@ -1,3 +1,10 @@
+
+Changes from 2.0.4 to 2.0.6
+---------------------------
+
+** Improvement
+    * [FELIX-4764] - Add support to GZIP based compact index files
+
 Changes from 2.0.2 to 2.0.4
 ---------------------------