Adapt to using Etcher instead of UUI

wiki/src/install/inc/steps/not_at_all.inline.mdwn

@@ -144,7 +144,7 @@
    1. If you are trying to start on a USB stick, which program did you
       use to install it:
 
-      - <span class="application">Universal USB Installer</span>,
+      - <span class="application">Etcher</span>,
       - <span class="application">GNOME Disks</span>,
       - <span class="application">Tails Installer</span>, or
       - <span class="command">dd</span> on the command line?