docs: fix ECMAScript Versions

[Blakelist7]

Example 5, 6 in Document.cookie

Signed-off-by: Kanwal Singh [email protected]

What was wrong/why is this fix needed? (quick summary only)
Issue with ES2016, ES2015 Labels

MDN URL of the main page changed

Issue number (if there is an associated issue)
fixes: #4912

Anything else that could help us review it

[github-actions]

Preview URLs

• https://pr5342.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/Document/cookie

Flaws

URL: /en-US/docs/Web/API/Document/cookie
Title: Document.cookie
on GitHub
Flaw count: 5

• macros:
  • /en-us/docs/web/api/parentnode (url: /en-US/docs/Web/API/ParentNode) does not exist
• broken_links:
  • Is currently http:// but can become https://
  • Is currently http:// but can become https://
  • Can't resolve /en-US/docs/Web/API/URLUtils.pathname
  • Can't resolve /ja/docs/Web/HTTP

External URLs

URL: /en-US/docs/Web/API/Document/cookie
Title: Document.cookie
on GitHub

No new external URLs

(this comment was updated 2021-05-26 14:35:53.563071)

[wbamberg]

Thanks for the PR, @Blakelist7 , but in #5031 we're going to remove the two versions of this example, and just use modern JS.