util/eventbus: fix docstrings (#16401)

Updates #15160

Signed-off-by: Claus Lensbøl <claus@tailscale.com>

util/eventbus/bus.go

@@ -40,8 +40,8 @@ type Bus struct {
 	clients   set.Set[*Client]
 }
 
-// New returns a new bus. Use [PublisherOf] to make event publishers,
-// and [Bus.Queue] and [Subscribe] to make event subscribers.
+// New returns a new bus. Use [Publish] to make event publishers,
+// and [Subscribe] and [SubscribeFunc] to make event subscribers.
 func New() *Bus {
 	ret := &Bus{
 		write:    make(chan PublishedEvent),