docs(changelog): changelog for v2.10 release

Change-Id: I44b88c3232d099b85ff71ee14c4918c4f8180146
Signed-off-by: Juan Pablo Conde <juanpablo.conde@arm.com>
diff --git a/package.json b/package.json
index 8b724dae..1c557fd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "trusted-firmware-a",
-  "version": "2.9.0",
+  "version": "2.10.0",
   "license": "BSD-3-Clause",
   "private": true,
   "scripts": {