Update dependencies

vendor/tailscale.com/version-embed.go

@@ -0,0 +1,40 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Package tailscaleroot embeds VERSION.txt into the binary.
+package tailscaleroot
+
+import (
+	_ "embed"
+	"runtime/debug"
+)
+
+// VersionDotTxt is the contents of VERSION.txt. Despite the tempting filename,
+// this does not necessarily contain the accurate version number of the build, which
+// depends on the branch type and how it was built. To get version information, use
+// the version package instead.
+//
+//go:embed VERSION.txt
+var VersionDotTxt string
+
+//go:embed ALPINE.txt
+var AlpineDockerTag string
+
+// GoToolchainRev is the git hash from github.com/tailscale/go that this release
+// should be built using. It may end in a newline.
+//
+//go:embed go.toolchain.rev
+var GoToolchainRev string
+
+func tailscaleToolchainRev() (gitHash string, ok bool) {
+	bi, ok := debug.ReadBuildInfo()
+	if !ok {
+		return "", false
+	}
+	for _, s := range bi.Settings {
+		if s.Key == "tailscale.toolchain.rev" {
+			return s.Value, true
+		}
+	}
+	return "", false
+}