cmd/tailscale/cli: correct app connector help text in set

Updates tailscale/corp#15437
Signed-off-by: James Tucker <james@tailscale.com>

cmd/tailscale/cli/set.go

@@ -69,7 +69,7 @@ func newSetFlagSet(goos string, setArgs *setArgsT) *flag.FlagSet {
 	setf.StringVar(&setArgs.hostname, "hostname", "", "hostname to use instead of the one provided by the OS")
 	setf.StringVar(&setArgs.advertiseRoutes, "advertise-routes", "", "routes to advertise to other nodes (comma-separated, e.g. \"10.0.0.0/8,192.168.0.0/24\") or empty string to not advertise routes")
 	setf.BoolVar(&setArgs.advertiseDefaultRoute, "advertise-exit-node", false, "offer to be an exit node for internet traffic for the tailnet")
-	setf.BoolVar(&setArgs.advertiseConnector, "advertise-connector", false, "offer to be an exit node for internet traffic for the tailnet")
+	setf.BoolVar(&setArgs.advertiseConnector, "advertise-connector", false, "offer to be an app connector for domain specific internet traffic for the tailnet")
 	setf.BoolVar(&setArgs.updateCheck, "update-check", true, "notify about available Tailscale updates")
 	setf.BoolVar(&setArgs.updateApply, "auto-update", false, "automatically update to the latest available version")
 	setf.BoolVar(&setArgs.postureChecking, "posture-checking", false, "HIDDEN: allow management plane to gather device posture information")