Corrected links

[ajmeese7]

Description

The links were redirecting and taking some time to do it, so I replaced them with the new link to cut out the redirect. The link in index.js was dead entirely, so I also replaced it with the closest thing at the new URL.

Testing

Was not tested. README changes do not need testing, but I removed an   from index.js because on the website the text was displayed with two spaces in front of it. You can view this behavior here. I'm assuming removing this space resolves the issue.

• [ ] This change adds test coverage for new/changed/fixed functionality

Checklist

• [x] I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• [x] All active GitHub checks for tests, formatting, and security are passing
• [x] The correct base branch is being used, if not master