use Addon-List link

Author: HSGamer

src/main/java/me/hsgamer/bettergui/downloader/AddonDownloader.java

@@ -20,7 +20,7 @@ public AddonDownloader(BetterGUI plugin) {
   public void postEnable() {
     AddonManager addonManager = plugin.get(AddonManager.class);
     this.downloader = new Downloader(
-      new JsonDownloadInfoLoader("https://raw.githubusercontent.com/BetterGUI-MC/Addon-List/master/addons.json"),
+      new JsonDownloadInfoLoader("https://bettergui-mc.github.io/Addon-List/addons.json"),
       new WebInputStreamLoader(),
       addonManager.getExpansionsDir()
     ) {