Replace any types with unknown/specific types (#58658)

src/automated-pipelines/lib/update-markdown.ts

@@ -14,7 +14,7 @@ import type { MarkdownFrontmatter } from '@/types'
 // Type definitions - extending existing type to add missing fields and make most fields optional
 type FrontmatterData = Partial<MarkdownFrontmatter> & {
   autogenerated?: string
-  [key: string]: any
+  [key: string]: unknown
 }
 
 type SourceContentItem = {