fix: default the downloaded update file name to fileInfo.info.url (#7597)

Author: marcuskirsch

.changeset/fix-default-filename.md

@@ -0,0 +1,5 @@
+---
+"electron-updater": patch
+---
+
+fix: default file name of `update.${fileExtension}` for downloaded files in private repositories.

packages/electron-updater/src/AppUpdater.ts

@@ -636,7 +636,7 @@ export abstract class AppUpdater extends (EventEmitter as new () => TypedEmitter
         return path.basename(urlPath)
       } else {
         // url like /latest, generate name
-        return `update.${taskOptions.fileExtension}`
+        return taskOptions.fileInfo.info.url
       }
     }