refactor subProcessOfCheckAndDownloadDependencies exit event handler - change the reject's argument to a string

packages/ui/src/main/window/mainWindow.ts

@@ -175,7 +175,7 @@ export function createMainWindow(): void {
             break
           }
           default: {
-            reject(exitCode)
+            reject('PUPPETEER_DOWNLOAD_ENCOUNTER_ERROR')
             break
           }
         }