chore: Update plugin names to use proper capitalization

docs/index.html

@@ -140,7 +140,7 @@
             document.body.appendChild(common);
         }
 
-        if (localStorage.getItem('pro') === 'true') {
+        if (localStorage.getItem('prod') === 'true') {
             artplayer.src = "./compiled/artplayer.js"
         } else {
             artplayer.src = "./uncompiled/artplayer/index.js"