docs(memory-management): Add documentation on S1 memory management

This patch also adds the Coverity Scan badge to the RMM Readme.rst

Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: I12de320a57ea64844b77d22d9c9fd9270bf9415c
diff --git a/docs/readme.rst b/docs/readme.rst
index 9a1ace1..c455de6 100644
--- a/docs/readme.rst
+++ b/docs/readme.rst
@@ -1,6 +1,9 @@
 .. SPDX-License-Identifier: BSD-3-Clause
 .. SPDX-FileCopyrightText: Copyright TF-RMM Contributors.
 
+.. image:: https://scan.coverity.com/projects/28411/badge.svg
+   :target: https://scan.coverity.com/projects/tf-rmm-tf-rmm
+
 #################
 Readme for TF-RMM
 #################
@@ -107,7 +110,7 @@
 -----------------
 
 .. |Realm VM| image:: ./about/diagrams/cca_software_arch.png
-.. _Realm Management Monitor (RMM) Specification: https://developer.arm.com/documentation/den0137/1-0eac2/?lang=en
+.. _Realm Management Monitor (RMM) Specification: https://developer.arm.com/documentation/den0137/1-0eac5/?lang=en
 .. _Arm CCA: https://www.arm.com/architecture/security-features/arm-confidential-compute-architecture
 .. _Arm CCA Software Stack Guide: https://developer.arm.com/documentation/den0127/0100/Overview
 .. _TF-A: https://www.trustedfirmware.org/projects/tf-a/