Added `` around function

Author: Nereuxofficial

src/06_multiple_futures/04_spawning.md

@@ -4,7 +4,7 @@ Spawning allows you to run a new asynchronous task in the background. This allow
 while it is running.
 
 Say we have a web server that wants to accept connections without blocking the main thread. 
-To achieve this, we can use the async_std::task::spawn function to create and run a new task that handles the 
+To achieve this, we can use the `async_std::task::spawn` function to create and run a new task that handles the 
 connections. This function takes a future and returns a JoinHandle, which can be used to wait for the result of the 
 task once it's completed.