minor: fix spelling

substrate/client/service/src/builder.rs

@@ -1153,7 +1153,7 @@ where
 	// sync protocol is initiated fast enough
 	// (see https://github.com/paritytech/polkadot-sdk/issues/6573#issuecomment-2563091343).
 	//
-	// The solution is far from ideal, because in the client code the nework starter is
+	// The solution is far from ideal, because in the client code the network starter is
 	// activated once all the tasks are spawned, not once they finished the initialization,
 	// so the race can still happen.
 	//