Update nextvs post

[necatiozmen]

PR Checklist

Please check if your PR fulfills the following requirements:

• [ ] The commit message follows our guidelines: https://refine.dev/docs/guides-concepts/contributing/#commit-convention

Bugs / Features

• [ ] Related issue(s) linked
• [ ] Tests for the changes have been added
• [ ] Docs have been added / updated
• [ ] Changesets have been added https://refine.dev/docs/guides-concepts/contributing/#creating-a-changeset

I made minor updates on the post.