fix: remove metadata issue

src/Blog/wwwroot/posts/chunked-resumable-file-uploads-dotnet/index.md

@@ -3,7 +3,7 @@
   "title": "Building a Chunked, Resumable File Upload System in .NET and Vanilla JS",
   "lead": "How to bypass reverse proxy payload limits, eliminate double-storage disk overhead, and build a resumable file uploader.",
   "isPublished": true,
-   n"publishedAt": "2026-09-03",
+  "publishedAt": "2026-09-03",
   "openGraphImage": "posts/chunked-resumable-file-uploads-dotnet/og-image.png"
 }
 ```