docs: update toolchain requirements

TF-A tests have been verified with the latest toolchain verison
13.2.Rel1. Henceforth the requirements are updated.

Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Change-Id: I076c2d6ac177d7436b460dcb39cfe383f5687f28
diff --git a/docs/getting_started/requirements.rst b/docs/getting_started/requirements.rst
index 74b3e3d..b69cced 100644
--- a/docs/getting_started/requirements.rst
+++ b/docs/getting_started/requirements.rst
@@ -28,7 +28,7 @@
 Note that at least Python 3.8 is required.
 
 Download and install the GNU cross-toolchain from Arm. The TF-A Tests have
-been tested with version 12.3.Rel1 (gcc 12.3):
+been tested with version 13.2.Rel1 (gcc 13.2):
 
 -  `GCC cross-toolchain`_
 
@@ -41,4 +41,4 @@
 
 --------------
 
-*Copyright (c) 2019-2022, Arm Limited. All rights reserved.*
+*Copyright (c) 2019-2024, Arm Limited. All rights reserved.*