Fix image path placeholder in frontmatter

Author: benfrank241

hindsight-docs/blog/2026-04-21-hindsight-10k-stars.md

@@ -3,7 +3,7 @@ title: "The 10k Star Story: How Hindsight Became Production Standard"
 description: "How Hindsight went from zero to 10,000 GitHub stars in 4.5 months. Why agent memory matters, what the community is building, and why they chose open-source."
 slug: "hindsight-10k-stars"
 date: "2026-04-21"
-image: "[HEADER_IMAGE_PATH]"
+image: "/img/blog/hindsight-10k-stars.png"
 ---
 
 # The 10k Star Story: How Hindsight Became Production Standard