fix update api

Pocket Poster/Pocket_PosterApp.swift

@@ -33,7 +33,7 @@ struct Pocket_PosterApp: App {
                 // check for update
                 if !checkedForUpdate {
                     checkedForUpdate = true
-                    if let version = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String, let url = URL(string: "https://api.github.com/leminlimez/Pocket-Poster/releases/latest") {
+                    if let version = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String, let url = URL(string: "https://api.github.com/repos/leminlimez/Pocket-Poster/releases/latest") {
                         let task = URLSession.shared.dataTask(with: url) {(data, response, error) in
                             guard let data = data else { return }