lua: fix reference to telnet.lua

(cherry picked from commit a9b61b9d)
Signed-off-by: Pierre Ynard <linkfanel@yahoo.fr>

share/lua/intf/modules/host.lua

@@ -59,7 +59,7 @@ Example use:
         end
     end
 
-For complete examples see existing VLC Lua interface modules (ie telnet.lua)
+For complete examples see existing VLC Lua interface modules (ie cli.lua)
 --]==========================================================================]
 
 module("host",package.seeall)