Fix typos in network-devp2p (#9371)

util/network-devp2p/src/node_table.rs

@@ -38,7 +38,7 @@ pub type NodeId = H512;
 pub struct NodeEndpoint {
 	/// IP(V4 or V6) address
 	pub address: SocketAddr,
-	/// Conneciton port.
+	/// Connection port.
 	pub udp_port: u16
 }
 
@@ -373,7 +373,7 @@ impl NodeTable {
 		self.useless_nodes.insert(id.clone());
 	}
 
-	/// Atempt to connect to useless nodes again.
+	/// Attempt to connect to useless nodes again.
 	pub fn clear_useless(&mut self) {
 		self.useless_nodes.clear();
 	}