Update dependencies

vendor/tailscale.com/feature/condregister/condregister.go

@@ -0,0 +1,7 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// The condregister package registers all conditional features guarded
+// by build tags. It is one central package that callers can empty import
+// to ensure all conditional features are registered.
+package condregister