Update dependencies

vendor/tailscale.com/net/netmon/netmon_polling.go

@@ -0,0 +1,21 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+//go:build (!linux && !freebsd && !windows && !darwin) || android
+
+package netmon
+
+import (
+	"tailscale.com/types/logger"
+)
+
+func newOSMon(logf logger.Logf, m *Monitor) (osMon, error) {
+	return newPollingMon(logf, m)
+}
+
+// unspecifiedMessage is a minimal message implementation that should not
+// be ignored. In general, OS-specific implementations should use better
+// types and avoid this if they can.
+type unspecifiedMessage struct{}
+
+func (unspecifiedMessage) ignore() bool { return false }