Upgrade docusaurus version to 3.8.1 (#2955)

Summary: Pull Request resolved: #2955

Test Plan:
Local build
<img width="1728" height="1080" alt="Screenshot 2025-08-05 at 2 22 20 PM" src="https://github.com/user-attachments/assets/95b267ce-edac-4887-b80d-b1cc04dac3d9" />
<img width="1728" height="1080" alt="Screenshot 2025-08-05 at 2 22 31 PM" src="https://github.com/user-attachments/assets/de6e4628-6d94-477a-ae99-036625521ae9" />
<img width="1728" height="1080" alt="Screenshot 2025-08-05 at 2 22 42 PM" src="https://github.com/user-attachments/assets/7c6278b0-c7e5-4c88-b299-e4108889093c" />
<img width="1728" height="1080" alt="Screenshot 2025-08-05 at 2 22 47 PM" src="https://github.com/user-attachments/assets/4dfd98e1-6016-4a65-a25b-62f64a4444d3" />

Reviewed By: CristianLara

Differential Revision: D79662729

Pulled By: saitcakmak

fbshipit-source-id: cc816197712de250092136115a1fa22ff0dcf638

Author: saitcakmak

website/package.json

@@ -11,19 +11,21 @@
     "write-heading-ids": "docusaurus write-heading-ids"
   },
   "devDependencies": {
-    "@docusaurus/module-type-aliases": "3.6.3",
-    "@docusaurus/types": "3.6.3"
+    "@docusaurus/module-type-aliases": "3.8.1",
+    "@docusaurus/types": "3.8.1"
   },
   "dependencies": {
-    "@docusaurus/core": "^3.6.3",
-    "@docusaurus/preset-classic": "^3.6.3",
+    "@docusaurus/core": "^3.8.1",
+    "@docusaurus/preset-classic": "^3.8.1",
     "bl": "^6.0.0",
     "clsx": "^1.1.1",
     "plotly.js": "^2.8.1",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-plotly.js": "^2.5.1",
     "rehype-katex": "7",
-    "remark-math": "6"
+    "remark-math": "6",
+    "on-headers": "^1.1.0",
+    "webpack-dev-server": "^5.2.1"
   }
 }