docs(changelog): use 32.png artwork for changelog #32

Replace the placeholder image with the real changelog #32 artwork in
both the frontmatter and the hero <Image>, following the
/images/changelog/NN.png convention.

Author: nibzard

content/docs/changelog/changelog-032.mdx

@@ -2,14 +2,14 @@
 title: "Changelog #032"
 sidebarTitle: "Changelog #032"
 llm: true
-image: "/images/changelog-placeholder-white.jpeg"
+image: "/images/changelog/32.png"
 imageAlt: "Announcing Changelog #032"
 publishedAt: "2026-07-03"
 ---
 import Image from 'next/image';
 
 <Image
-  src="/images/changelog-placeholder-white.jpeg"
+  src="/images/changelog/32.png"
   alt="Announcing Changelog #032"
   width={800}
   height={400}