Documentation/livepatch: Fix stale link to gmame

gmame archive does not longer exist. Use the message id and
generic redirector instead.

Reported-by: John Donnelly <john.donnelly@canonical.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>