fix build error

Author: KianNH

src/content/docs/ai-gateway/changelog.mdx

@@ -3,9 +3,6 @@ pcx_content_type: changelog
 title: Changelog
 sidebar:
   order: 9
-changelog:
-  products:
-    - changelog_file_name
 ---
 
 import { ProductChangelog } from "~/components";