Update links in README

[daico007]

PR Summary:

Some of the links in README is outdated after the documentation overhaul. This PR updates those links to their correct new path. Relate to #482

PR Checklist

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• [ ] Includes appropriate unit test(s)
• [ ] Appropriate docstring(s) are added/updated
• [ ] Code is (approximately) PEP8 compliant
• [ ] Issue(s) raised/addressed?

[InnocentBug]

:+1: