Update dependencies

vendor/tailscale.com/util/sysresources/memory_darwin.go

@@ -0,0 +1,16 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+//go:build darwin
+
+package sysresources
+
+import "golang.org/x/sys/unix"
+
+func totalMemoryImpl() uint64 {
+	val, err := unix.SysctlUint64("hw.memsize")
+	if err != nil {
+		return 0
+	}
+	return val
+}