Update

vendor/tailscale.com/net/dns/noop.go

@@ -1,4 +1,4 @@
-// Copyright (c) Tailscale Inc & AUTHORS
+// Copyright (c) Tailscale Inc & contributors
 // SPDX-License-Identifier: BSD-3-Clause
 
 package dns
@@ -15,3 +15,8 @@ func (m noopManager) GetBaseConfig() (OSConfig, error) {
 func NewNoopManager() (noopManager, error) {
 	return noopManager{}, nil
 }
+
+func isNoopManager(c OSConfigurator) bool {
+	_, ok := c.(noopManager)
+	return ok
+}