chore(fundamental-redirects): add more /docs/ prefix redirects (#11223)

We see a couple of page URLs without /docs/ in our top HTTP 404s list:
- /en-US/Media_formats_supported_by_the_audio_and_video_elements
- /en-US/JavaScript_typed_arrays/ArrayBuffer
- /en-US/JavaScript_typed_arrays/Uint8Array
- /en-US/ECMAScript_DontEnum_attribute
- /en-US/Using_audio_and_video_in_Firefox

libs/fundamental-redirects/index.js

@@ -1162,7 +1162,7 @@ const MISC_REDIRECT_PATTERNS = [
   // redirects often take over from there, so let's only insert "/docs/"
   // and let any other redirect rules work from that point onwards.
   localeRedirect(
-    /^(?<prefix>AJAX|CSS|DOM|DragDrop|HTML|JavaScript|SVG|Tools|Using_files_from_web_applications|Web|XMLHttpRequest|Security)(?<subPath>\/.+?)?\/?$/i,
+    /^(?<prefix>AJAX|CSS|DOM|DragDrop|ECMAScript_DontEnum_attribute|HTML|JavaScript|JavaScript_typed_arrays|Media_formats_supported_by_the_audio_and_video_elements|SVG|Tools|Using_audio_and_video_in_Firefox|Using_files_from_web_applications|Web|XMLHttpRequest|Security)(?<subPath>\/.+?)?\/?$/i,
     ({ prefix, subPath = "" }) => `/docs/${prefix}${subPath}`,
     { permanent: true }
   ),

testing/tests/redirects.test.ts

@@ -1222,15 +1222,27 @@ const MISC_REDIRECT_URLS = [].concat(
     "/en-US/DragDrop/Drag_and_Drop/",
     "/en-US/docs/DragDrop/Drag_and_Drop"
   ),
+  url_test(
+    "/en-US/ECMAScript_DontEnum_attribute",
+    "/en-US/docs/ECMAScript_DontEnum_attribute"
+  ),
   url_test("/en-US/HTML", "/en-US/docs/HTML"),
   url_test("/en-US/HTML/", "/en-US/docs/HTML"),
   url_test("/en-US/HTML/Canvas/", "/en-US/docs/HTML/Canvas"),
   url_test("/en-US/JavaScript", "/en-US/docs/JavaScript"),
   url_test("/en-US/JavaScript/", "/en-US/docs/JavaScript"),
+  url_test(
+    "/en-US/JavaScript_typed_arrays/ArrayBuffer",
+    "/en-US/docs/JavaScript_typed_arrays/ArrayBuffer"
+  ),
   url_test(
     "/en-US/JavaScript/Reference/About/",
     "/en-US/docs/JavaScript/Reference/About"
   ),
+  url_test(
+    "/en-US/Media_formats_supported_by_the_audio_and_video_elements",
+    "/en-US/docs/Media_formats_supported_by_the_audio_and_video_elements"
+  ),
   url_test("/en-US/SVG", "/en-US/docs/SVG"),
   url_test("/en-US/SVG/", "/en-US/docs/SVG"),
   url_test("/en-US/SVG/Element/font/", "/en-US/docs/SVG/Element/font"),
@@ -1240,6 +1252,10 @@ const MISC_REDIRECT_URLS = [].concat(
     "/en-US/Tools/Memory/Treemap_view/",
     "/en-US/docs/Tools/Memory/Treemap_view"
   ),
+  url_test(
+    "/en-US/Using_audio_and_video_in_Firefox",
+    "/en-US/docs/Using_audio_and_video_in_Firefox"
+  ),
   url_test(
     "/en-US/Using_files_from_web_applications",
     "/en-US/docs/Using_files_from_web_applications"