docs: add inital lts doc

Ref: https://linaro.atlassian.net/browse/TFC-669

The initial LTS document was created as pdf and was maintained in a
shared folder location, to avoid pdf getting lost and trying to find
where it is we decided to have LTS details part of docs in TF-A.

This patch directly reflects the data from pdf attached to TFC-669.
Any improvements or amends to this will be done at later phases based
on LTS maintainers comments and agreements.

Change-Id: I1434c29f0236161d2a127596e2cc528bf4cc3e85
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/docs/about/release-information.rst b/docs/about/release-information.rst
index 9d6bbf6..dc2b2fd 100644
--- a/docs/about/release-information.rst
+++ b/docs/about/release-information.rst
@@ -35,7 +35,7 @@
 
 For example, TF-A v2.10 has VERSION_MAJOR=2, VERSION_MINOR=10 and VERSION_PATCH=0.
 
-This VERSION_PATCH macro is only increased for LTS releases.
+This VERSION_PATCH macro is only increased for :ref:`LTS - Long-Term Support` releases.
 
 Upcoming Releases
 ~~~~~~~~~~~~~~~~~
@@ -120,4 +120,4 @@
 
 --------------
 
-*Copyright (c) 2018-2024, Arm Limited and Contributors. All rights reserved.*
+*Copyright (c) 2018-2025, Arm Limited and Contributors. All rights reserved.*