Update dependencies

vendor/tailscale.com/net/tshttpproxy/tshttpproxy_linux.go

@@ -0,0 +1,24 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+//go:build linux
+
+package tshttpproxy
+
+import (
+	"net/http"
+	"net/url"
+
+	"tailscale.com/version/distro"
+)
+
+func init() {
+	sysProxyFromEnv = linuxSysProxyFromEnv
+}
+
+func linuxSysProxyFromEnv(req *http.Request) (*url.URL, error) {
+	if distro.Get() == distro.Synology {
+		return synologyProxyFromConfigCached(req)
+	}
+	return nil, nil
+}