[fix] YouTube Mobile Locale URL Doesn't Exist

On m.youtube.com, the locale URL doesn't exist. This will throw an invalid URL (passes undefined to the URL constructor).

On quick glance it doesn't appear that there's a good alternative on mobile, so I just fallback to 'en'.

Extensions/UserScript/Return Youtube Dislike.user.js

@@ -354,11 +354,11 @@ function roundDown(num) {
 }
 
 function numberFormat(numberState) {
-  const userLocales = new URL(
-    Array.from(document.querySelectorAll("head > link[rel='search']"))
-      ?.find((n) => n?.getAttribute("href")?.includes("?locale="))
-      ?.getAttribute("href")
-  )?.searchParams?.get("locale");
+  let localeURL = Array.from(document.querySelectorAll("head > link[rel='search']"))
+    ?.find((n) => n?.getAttribute("href")?.includes("?locale="))
+    ?.getAttribute("href");
+  
+  const userLocales = localeURL ? new URL(localeURL)?.searchParams?.get("locale") : 'en';
 
   const formatter = Intl.NumberFormat(
     document.documentElement.lang || userLocales,