doc: terminology cleanup in Hybrid GSG, tutorials

- Replace SOS or Service OS with Service VM
- Replace UOS or User OS with User VM
- Capitalize ACRN Configurator

Signed-off-by: Amy Reyes <amy.reyes@intel.com>

doc/tutorials/nvmx_virtualization.rst

@@ -113,10 +113,10 @@ ACRN only supports enabling the nested virtualization feature on the Service VM,
 VMs.
 
 The nested virtualization feature is disabled by default in ACRN. You can
-enable it using the :ref:`ACRN configurator tool <acrn_configurator_tool>`
+enable it using the :ref:`ACRN Configurator <acrn_configurator_tool>`
 with these settings:
 
-.. note:: Normally you'd use the configurator tool GUI to edit the scenario XML file.
+.. note:: Normally you'd use the ACRN Configurator GUI to edit the scenario XML file.
    The tool wasn't updated in time for the v2.5 release, so you'll need to manually edit
    the ACRN scenario XML configuration file to edit the ``SCHEDULER``, ``NVMX_ENABLED``,
    ``pcpu_id`` , ``guest_flags``, ``legacy_vuart``, and ``console_vuart`` settings for
@@ -232,7 +232,7 @@ Here is a summary of how to modify and build the kernel:
 
    git clone https://github.com/projectacrn/acrn-kernel
    cd acrn-kernel
-   cp kernel_config_uefi_sos .config
+   cp kernel_config_service_vm .config
    make olddefconfig
 
 The following configuration entries are needed to launch nested

doc/tutorials/using_hybrid_mode_on_nuc.rst

@@ -76,7 +76,7 @@ Set-up ACRN on your device
   .. code-block:: none
 
      cd ~/acrn-kernel # Or where your ACRN kernel sources are
-     cp kernel_config_uefi_sos .config
+     cp kernel_config_service_vm .config
      make olddefconfig
      make
      sudo make modules_install

doc/tutorials/using_windows_as_user_vm.rst

@@ -114,7 +114,7 @@ Prepare the Script to Create an Image
      --windows \
      $vm_name
    }
-   # offline SOS CPUs except BSP before launch UOS
+   # offline Service VM CPUs except BSP before launching User VM
    for i in `ls -d /sys/devices/system/cpu/cpu[1-99]`; do
            online=`cat $i/online`
            idx=`echo $i | tr -cd "[1-99]"`