Upgrades documentation example using SimpleProject out of date

[abcoathup]

Reported by shark0der on Telegram

https://docs.openzeppelin.com/upgrades/2.8/
is the example on this page out of date?
according to the tests, SimpleProject requires 3 parameters and the txDetails is the 3rd not the second as per example

openzeppelin-sdk/packages/lib/test/src/project/SimpleProject.test.js

Line 20 in b3e9452

beforeEach('initializing', async function() {

additionally, it requires a proxyAddress as string, not a proxy object/instance