update plugin manifest url

Emby.Server.Implementations/ConfigurationOptions.cs

@@ -18,7 +18,7 @@ namespace Emby.Server.Implementations
         {
             { HostWebClientKey, bool.TrueString },
             { HttpListenerHost.DefaultRedirectKey, "web/index.html" },
-            { InstallationManager.PluginManifestUrlKey, "https://repo.jellyfin.org/releases/plugin/manifest.json" },
+            { InstallationManager.PluginManifestUrlKey, "https://repo.jellyfin.org/releases/plugin/manifest-stable.json" },
             { FfmpegProbeSizeKey, "1G" },
             { FfmpegAnalyzeDurationKey, "200M" },
             { PlaylistsAllowDuplicatesKey, bool.TrueString }