Doc: Removed TF-M prefix from document heading

This patch removes the TF-M/Trusted Firmware prefix from the
title heading across the documentation.

Change-Id: I60e0c6e48615f67ee040a0d6dbc7d6f1873856e7
Signed-off-by: Galanakis, Minos <minos.galanakis@arm.com>
diff --git a/docs/user_guides/tfm_sw_requirement.rst b/docs/user_guides/tfm_sw_requirement.rst
index 2c4f470..432b237 100644
--- a/docs/user_guides/tfm_sw_requirement.rst
+++ b/docs/user_guides/tfm_sw_requirement.rst
@@ -1,6 +1,6 @@
-##########################
-TF-M Software requirements
-##########################
+#####################
+Software requirements
+#####################
 
 .. |DS5_VERSION| replace:: v5.29.1
 .. |KEIL_VERSION| replace:: v5.25.2