docs: the change log for the v2.13 release

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: Iaee3a9077974dcf59935cd1d6224b3fe73c06a95
diff --git a/docs/conf.py b/docs/conf.py
index 5190eb3..31b64a1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -14,8 +14,8 @@
 
 project = "Hafnium"
 author = "Hafnium contributors"
-version = "2.12.0"
-release = "2.12.0"
+version = "2.13.0"
+release = "2.13.0"
 
 # -- General configuration ---------------------------------------------------