docs(changelog): changelog for lts-v2.12.1 release

Change-Id: Id73c4039740d206e7c0dc386b2b7d5d3cd73f9d3
Signed-off-by: Release CI <ci@trustedfirmware.org>
diff --git a/docs/conf.py b/docs/conf.py
index 3a7264f..dbd6393 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -14,8 +14,8 @@
 
 project = "Trusted Firmware-A"
 author = "Trusted Firmware-A contributors"
-version = "2.12.0"
-release = "2.12.0"
+version = "2.12.1"
+release = "2.12.1"
 
 # -- General configuration ---------------------------------------------------