doc: Various errata of GM_cookie

[PRO-2684]

• expirationDate not present at the documentation of cookie objects under GM_cookie.list.
• Typo of GM.cookies under "Example usage" - it should be GM.cookie.
  
• Invalid example at "Example usage" - GM.cookie.list() doesn't return, but GM.cookie.list({}) works as expected.

Specifications

• Chromium: Edge 130.0.2849.80
• TM: v5.3.6216
• OS: Windows 11 23H2, 22631.4460

Script

Adapted from #465 (comment)

// ==UserScript==
// @name         Test cookie
// @namespace    xxx
// @version      xxx
// @description  xxx
// @author       xxx
// @match        *://*/*
// @grant        GM.xmlHttpRequest
// @grant        GM.cookie
// @connect      httpbin.org
// ==/UserScript==


const getRandomString = () => (new Date()).getTime().toString(36) + Math.random().toString(36).slice(2);

const d = getRandomString();
await GM.xmlHttpRequest({ url: 'https://httpbin.org/response-headers?set-cookie=partitioned='+d+';path=/;expires=Wed,%2021%20Sep%202033%2015:59:37%20GMT;httponly;secure;samesite=none;partitioned' })
await GM.xmlHttpRequest({ url: 'https://httpbin.org/response-headers?set-cookie=nonpartitioned='+d+';path=/;expires=Wed,%2021%20Sep%202033%2015:59:37%20GMT;httponly;secure;samesite=none' })

console.log('expected value', d);
console.log("Arg: {...}", await GM.cookie.list({ url: 'https://httpbin.org/', partitionKey: {} })); // Success
console.log("Arg: {}", await GM.cookie.list({})); // Success
console.log("Arg: undefined", await GM.cookie.list()); // Never resolves