Update dependencies

vendor/tailscale.com/syncs/shardvalue_tailscale.go

@@ -0,0 +1,24 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// TODO(raggi): update build tag after toolchain update
+//go:build tailscale_go
+
+package syncs
+
+import (
+	"runtime"
+)
+
+//lint:ignore U1000 unused under tailscale_go builds.
+type shardValuePool struct{}
+
+// NewShardValue constructs a new ShardValue[T] with a shard per CPU.
+func NewShardValue[T any]() *ShardValue[T] {
+	return &ShardValue[T]{shards: make([]T, runtime.NumCPU())}
+}
+
+// One yields a pointer to a single shard value with best-effort P-locality.
+func (sp *ShardValue[T]) One(f func(*T)) {
+	f(&sp.shards[runtime.TailscaleCurrentP()%len(sp.shards)])
+}