Getting Started Guide: fix highlighting in launch_uos.sh

The "launch_uos.sh" script has evolved and the lines that we
highlight have moved. Update the syntax to highlight the correct
lines.

Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>

doc/getting-started/apl-nuc.rst

@@ -338,7 +338,7 @@ Set up Reference UOS
    .. literalinclude:: ../../devicemodel/samples/nuc/launch_uos.sh
       :caption: devicemodel/samples/nuc/launch_uos.sh
       :language: bash
-      :emphasize-lines: 26,28
+      :emphasize-lines: 23,25
 
    .. note::
       In case you have downloaded a different Clear Linux image than the one above