feat(website): add co-maintainer credit and bump hero-sub font size

- Replace 'Curated by @vinta since 2014' with 'Maintained by @vinta
  and @JinyangWang27' to reflect the new co-maintainer
- Increase .hero-sub font size from --text-sm to --text-base for
  better readability

Co-Authored-By: Claude <[email protected]>