docs(release): changelog for v2.13 release

Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
Change-Id: I7247f50f336dfcfbe62308bd4b6721bc8f9a9fd4
diff --git a/Makefile b/Makefile
index 29b0f3b..3ebf566 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,12 @@
 #
-# Copyright (c) 2018-2024, Arm Limited. All rights reserved.
+# Copyright (c) 2018-2025, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
 # TFTF Version
 VERSION_MAJOR		:= 2
-VERSION_MINOR		:= 12
+VERSION_MINOR		:= 13
 
 MAKE_HELPERS_DIRECTORY := make_helpers/
 include ${MAKE_HELPERS_DIRECTORY}build_macros.mk