Revert "keep lock longer"

This reverts commit b501ab1532.

src/peer_channels.rs

@@ -90,7 +90,6 @@ impl Iroh {
             0
         };
 
-        let mut channels = self.iroh_channels.write().await;
         let peers = get_iroh_gossip_peers(ctx, msg_id).await?;
         info!(
             ctx,
@@ -116,7 +115,10 @@ impl Iroh {
             .join(topic, peers.into_iter().map(|addr| addr.node_id).collect())
             .await?;
 
-        channels.insert(topic, ChannelState::new(seq, subscribe_loop));
+        self.iroh_channels
+            .write()
+            .await
+            .insert(topic, ChannelState::new(seq, subscribe_loop));
 
         Ok(Some(connect_future))
     }