Resolve "Refactor blog landing page article cards"

Step 1: What is changing in this MR?

Replaces category links in homepage cards with plain text, to fix inconsistent hover states and avoid event bubbling

Review App	Production
https://199-refactor-blog-landing-page-article-cards.about.gitlab-review.app/blog/	https://about.gitlab.com/blog/

Closes #199 (closed)