docs(changelog): changelog for lts-v2.12.4 release

Change-Id: Id513d026bf0d72a8c3cb1fb77e3e6c84964d2894
Signed-off-by: Release CI <ci@trustedfirmware.org>
diff --git a/readme.rst b/readme.rst
index 206c9c7..37bf498 100644
--- a/readme.rst
+++ b/readme.rst
@@ -52,3 +52,4 @@
 
 
 
+