Apply suggestions from code review

Co-authored-by: Daiane Angolini <angolini@gmail.com>

Author: kprosise

source/getting-started/signup/index.rst

@@ -45,7 +45,7 @@ Click :guilabel:`Create Factory` once your details are entered.
 
 The :ref:`ref-linux` supports a wide range of platforms out of the box.
 This includes QEMU_ images for ARM_ and RISC-V_ architectures.
-To run an x86-64 image, select **Generic x86-64**, which works on both intel-core-i7-64 machines and x86-64 QEMU.
+To run an x86-64 image, select **Generic x86-64**, which works on both ``intel-core-i7-64`` and ``qemuarm64-secureboot`` machines.
 
 .. figure:: /_static/signup/create.png
    :width: 450