fix: update thumbnail path for stats card usage article

Author: pphatdev

content/posts/stats-card-usage/index.mdx

@@ -8,7 +8,7 @@ authors:
     name: "PPhat Dev"
     profile: "https://github.com/pphatdev.png"
     url: "https://pphat.top"
-thumbnail: "/assets/blogs/stats-card-usage/cover.webp"
+thumbnail: "/blogs/stats-card-usage/cover.webp"
 published: true
 createdAt: "2026-03-19T08:00:00.000Z"
 updatedAt: "2026-03-19T08:00:00.000Z"