tokio 1.0: delay -> sleep

almost the same thing, new name(s), no longer Unpin

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

src/bin/proxmox-backup-manager.rs

@@ -41,7 +41,7 @@ pub async fn wait_for_local_worker(upid_str: &str) -> Result<(), Error> {
 
     loop {
         if proxmox_backup::server::worker_is_active_local(&upid) {
-            tokio::time::delay_for(sleep_duration).await;
+            tokio::time::sleep(sleep_duration).await;
         } else {
             break;
         }