docs: update nextjs quickstart

[christiannwamba]

Related Issue or Design Document

Checklist

• I have read the contributing guidelines and signed the CLA.
• I have referenced an issue containing the design document if my change introduces a new feature.
• I have read the security policy.
• I confirm that this pull request does not address a security vulnerability.
  If this pull request addresses a security vulnerability,
  I confirm that I got approval (please contact [email protected]) from the maintainers to push the changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added the necessary documentation within the code base (if appropriate).

Further comments

[aeneasr]

You can re-trigger the CI by clicking on the failing task. In cases like this where set up fails on install, it's probably some flake issue. I did it for you in this case

[vinckr]

missing the "Make authenticated requests to your API" part in the text - its there in the code examples we just need to assume the user is starting from scratch and also add it to the text!