fix: author is added in _fields for the blog slug

[anurag-p6]

Concisely describe the change

Fixes #612

In src/pages/index.tsx (line 56) and src/pages/features.tsx (line 180), add author to the _fields query parameter:
_fields=id, author, author_info, title, wbDate, jetpack_featured_media_url, link, excerpt
Tested against the API without author in _fields, the response returns author_link: "https://blog.podman.io/author/". With it included, the correct slug is returned e.g. "https://blog.podman.io/author/mloriedo/".

Before screenshot / screen recording

2026-08-01.02-10-44.-.Trim.mp4

After screenshot / screen recording

2026-08-01.02-20-06.-.Trim.mp4

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