Merge pull request #3924 from davidkurilla/infra-convert-listing-in-ch01-03

Convert ch01-03-hello-cargo.md Listing 1-2 using `<Listing>`

Author: chriskrycho

src/ch01-03-hello-cargo.md

@@ -58,7 +58,7 @@ repository; you can override this behavior by using `cargo new --vcs=git`.
 Open *Cargo.toml* in your text editor of choice. It should look similar to the
 code in Listing 1-2.
 
-<span class="filename">Filename: Cargo.toml</span>
+<Listing number="1-2" file-name="Cargo.toml" caption="Contents of *Cargo.toml* generated by `cargo new`">
 
 ```toml
 [package]
@@ -71,8 +71,7 @@ edition = "2021"
 [dependencies]
 ```
 
-<span class="caption">Listing 1-2: Contents of *Cargo.toml* generated by `cargo
-new`</span>
+</Listing>
 
 This file is in the [*TOML*][toml]<!-- ignore --> (*Tom’s Obvious, Minimal
 Language*) format, which is Cargo’s configuration format.