Update README.md example

README.md

@@ -32,7 +32,7 @@ pub fn network_request() -> Result(String, NetworkError) {
 }
 
 pub fn main() {
-  persevero.new(wait_time: 500, backoff: int.multiply(_, 2))
+  persevero.exponential_backoff(500, 2)
   |> persevero.max_wait_time(5000)
   |> persevero.execute(
     allow: fn(error) {