Update dependencies

vendor/tailscale.com/util/must/must.go

@@ -0,0 +1,25 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Package must assists in calling functions that must succeed.
+//
+// Example usage:
+//
+//	var target = must.Get(url.Parse(...))
+//	must.Do(close())
+package must
+
+// Do panics if err is non-nil.
+func Do(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+// Get returns v as is. It panics if err is non-nil.
+func Get[T any](v T, err error) T {
+	if err != nil {
+		panic(err)
+	}
+	return v
+}