[Documentation error]: The value assignment is set before the declaration

[Dmitry-Titov-K]

Hi
in the example, I noticed an error, a value is assigned to a variable, but it is not declared (152)

pino-http/README.md

Lines 149 to 154 in 3b0d314

	genReqId: function (req, res) {
	const existingID = req.id ?? req.headers["x-request-id"]
	if (existingID) return existingID
	id = randomUUID()
	res.setHeader('X-Request-Id', id)
	return id