Add the default excludes

This was suggested in facebook/docusaurus#10708 (comment).

It doesn't fix the build issue, but seems good to do regardless to
not hit other issues down the road.

Author: LegNeato

blog/2024-11-21-optimizing-matrix-mul/code/Cargo.lock

@@ -58,7 +58,13 @@ const config: Config = {
             xslt: true,
           },
           editUrl: "https://github.com/Rust-GPU/rust-gpu.github.io/tree/main/",
-          exclude: ["*/code/**"],
+          exclude: [
+            '**/_*.{js,jsx,ts,tsx,md,mdx}',
+            '**/_*/**',
+            '**/*.test.{js,jsx,ts,tsx}',
+            '**/__tests__/**',
+            '**/code/**'
+          ],
           onInlineTags: "throw",
           onInlineAuthors: "throw",
           onUntruncatedBlogPosts: "throw",