RegEx updated

Following @Pant 's suggestion in dcode-youtube#7 (comment), I have made this change.

I have now tried it for a few days, and it seems to work well.

frontend/static/js/index.js

@@ -31,7 +31,7 @@ const router = async () => {
     const potentialMatches = routes.map(route => {
         return {
             route: route,
-            result: location.pathname.match(pathToRegex(route.path))
+            result: location.pathname.replace(/\/$/g, "").match(pathToRegex(route.path))
         };
     });
 
@@ -60,4 +60,4 @@ document.addEventListener("DOMContentLoaded", () => {
     });
 
     router();
-});
+});