docs(changelog): changelog for v2.9 release

Change-Id: Ic8cd82c5424af422feedefdc001d291001817a8b
Signed-off-by: Juan Pablo Conde <juanpablo.conde@arm.com>
diff --git a/tools/conventional-changelog-tf-a/package.json b/tools/conventional-changelog-tf-a/package.json
index 3dd9877..116b28b 100644
--- a/tools/conventional-changelog-tf-a/package.json
+++ b/tools/conventional-changelog-tf-a/package.json
@@ -1,6 +1,6 @@
 {
   "name": "conventional-changelog-tf-a",
-  "version": "2.8.0",
+  "version": "2.9.0",
   "license": "BSD-3-Clause",
   "private": true,
   "main": "index.js",