chore: 调整RaftConnectionFactory中创建链接的unwrap为?

src/raft/network/factory.rs

@@ -93,7 +93,7 @@ impl RaftConnectionFactory {
             Ok(channel)
         } else {
             let addr = format!("http://{}", &key);
-            let channel = Arc::new(Channel::from_shared(addr).unwrap().connect_lazy().unwrap());
+            let channel = Arc::new(Channel::from_shared(addr)?.connect_lazy()?);
             self.channel_cache.set(key, channel.clone(), self.cache_ses);
             Ok(channel)
         }