fix: memory leak

[ghost]

// Before Go 1.23, this documentation warned that the underlying
// [Timer] would not be recovered by the garbage collector until the
// timer fired, and that if efficiency was a concern, code should use
// NewTimer instead and call [Timer.Stop] if the timer is no longer needed.
// As of Go 1.23, the garbage collector can recover unreferenced,
// unstopped timers. There is no reason to prefer NewTimer when After will do.