Docs: Musca-S1 documentation clarification

In the documentation, clarifies the location where the code runs from.
(embedded flash -> eMRAM)

Signed-off-by: Dávid Házi <david.hazi@arm.com>
Change-Id: Ib44ce5da02cb8e6e0890fde0b20c51de96f33b53
diff --git a/docs/platform/arm/musca_s1/readme.rst b/docs/platform/arm/musca_s1/readme.rst
index d6c0596..284cd16 100644
--- a/docs/platform/arm/musca_s1/readme.rst
+++ b/docs/platform/arm/musca_s1/readme.rst
@@ -5,8 +5,8 @@
 ****************
 DAPLink Firmware
 ****************
-The code on Musca-S1 is running from embedded flash. Make sure that the DAPLink
-FW for QSPI/MRAM is downloaded to the board. You can find on the
+The code on Musca-S1 is running from on-chip eMRAM (2MB non-volatile bootable memory).
+Make sure that the DAPLink FW for QSPI/MRAM is downloaded to the board. You can find on the
 `Arm Community page <https://community.arm.com/oss-platforms/w/docs/463/musca-s1-firmware-update-qspi-mram-boot-recovery>`__
 A short description of how to update the DAPLink FW can be found there as well.
 
@@ -22,4 +22,4 @@
 
 --------------
 
-*Copyright (c) 2022, Arm Limited. All rights reserved.*
+*Copyright (c) 2023, Arm Limited. All rights reserved.*