Fix parallel file downloads not working

src/main.rs

@@ -109,7 +109,8 @@ async fn download_multiple(args: CLIArgs, raw_urls: Vec<String>) -> Result<()> {
 }
 
 async fn download_job(urls: SyncQueue, reporter: UnboundedSender<DlReport>, cli_args: CLIArgs) {
-    while let Some(dlreq) = urls.lock().await.pop_front() {
+    // The mutex access must be in its own scope to ensure that the lock is dropped
+    while let Some(dlreq) = { urls.lock().await.pop_front() } {
         let reporter = DlReporter::new(dlreq.id as u32, reporter.clone());
 
         // Resolve the zippy url to the direct download url if necessary