docs(changelog): changelog for lts-v2.8.24 release

Change-Id: I0528d421f08462a7bce6c41919a667c648380e30
Signed-off-by: Release CI <ci@trustedfirmware.org>
diff --git a/docs/conf.py b/docs/conf.py
index 00fc9cc..eebc75c 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -14,8 +14,8 @@
 
 project = "Trusted Firmware-A"
 author = "Trusted Firmware-A contributors"
-version = "2.8.23"
-release = "2.8.23"
+version = "2.8.24"
+release = "2.8.24"
 
 # -- General configuration ---------------------------------------------------