Update readme example

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "tracing-awc"
 description = "Tracing instrumentation for the awc http client"
-version = "0.1.1"
+version = "0.1.2"
 authors = ["asonix <asonix@asonix.dog"]
 edition = "2018"
 license = "AGPL-3.0"

README.md

@@ -14,11 +14,16 @@ tracing-awc = { version = "0.1.0", features = ["opentelemetry_0_17"]
 ```rust
 use awc::Client;
 use std::error::Error;
-use tracing_awc::{root_span, Propagate};
+use tracing_awc::{root_span, Tracing};
 use tracing_futures::Instrument;
 
 async fn request(url: &str) -> Result<(), Box<dyn Error>> {
-    Client::new().get(url).propagate().send().await?;
+    Client::builder()
+        .wrap(Tracing)
+        .finish()
+        .get(url)
+        .send()
+        .await?;
 
     Ok(())
 }