[Freeciv-Dev] (PR#10445) observe command help text is wrong

["Mike Kaufman" <kaufman@xxxxxxxxxxxxxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=10445 >

Command: observe  -  Observe a player.
Synopsis: observe [connection-name] <player-name>
Level: info
Description:
  Only the console and connections with cmdlevel 'hack' can force other
  connections to observe a player. If you're not one of these, only the
  <player-name> argument is allowed

<player-name> should not be mandatory since clients don't need it to be a
global observer.

-mike