update rocket section of the blog post

Author: pietroalbini

posts/2020-07-16-Rust-1.45.0.md

@@ -199,24 +199,23 @@ fn main() {
 ```
 
 Being able to use macros in more places is interesting, but there's another
-reason why many Rustaceans have been waiting for this feature for a long
-time. [Rocket](https://rocket.rs/) is a popular web framework for Rust.
-Initially released in December of 2016, it has often been described as one of
-the best things the Rust ecosystem has to offer. Here's the "hello world"
-example from its homepage:
+reason why many Rustaceans have been waiting for this feature for a long time:
+[Rocket](https://rocket.rs). Inititally released in December of 2016, Rocket is
+a popular web framework for Rust often described as one of the best things the
+Rust ecosystem has to offer. Here's the "hello world" example from its upcoming
+release:
 
 ```rust
-#![feature(proc_macro_hygiene, decl_macro)]
-
 #[macro_use] extern crate rocket;
 
-#[get("/hello/<name>/<age>")]
+#[get("/<name>/<age>")]
 fn hello(name: String, age: u8) -> String {
     format!("Hello, {} year old named {}!", age, name)
 }
 
-fn main() {
-    rocket::ignite().mount("/", routes![hello]).launch();
+#[launch]
+fn rocket() -> rocket::Rocket {
+    rocket::ignite().mount("/hello", routes![hello])
 }
 ```