Fix error

rust/src/net/network_manager.rs

@@ -28,7 +28,7 @@ use crate::{
 #[class(base=Node)]
 pub struct NetworkManager {
     #[export]
-    fake_ping: u64,
+    fake_ping: u32,
 
     pub peer: Option<PeerKind>,
 
@@ -275,7 +275,7 @@ impl NetworkManager {
                 None,
                 PeerConfig::default()
                     .with_identifier(NetworkManager::identifier())
-                    .with_additional_ping(Duration::from_millis(self.fake_ping)),
+                    .with_additional_ping(Duration::from_millis(self.fake_ping as u64)),
             );
             match peer {
                 Ok(mut peer) => {