Use the actual name of that tool

wiki/src/doc/first_steps/introduction_to_gnome_and_the_tails_desktop.mdwn

@@ -25,7 +25,7 @@ The <span class="guimenu">Applications</span> menu provides shortcuts to the
 [[!img applications.png link=no alt="Applications menu"]]
 
 <span class="guimenuitem">Help</span>:
-to access the GNOME help menu choose
+to access the GNOME Desktop Help choose
 <span class="menuchoice">
   <span class="guisubmenu">Accessories</span>&nbsp;▸
   <span class="guimenuitem">Help</span></span>