Merge pull request #2 from ninjapanzer/pks/intro2

Pks/intro2

exercises/intro/intro2.rs

@@ -2,8 +2,7 @@
 // Make the code print a greeting to the world.
 // Execute `rustlings hint intro2` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
-
 fn main() {
-    println!("Hello {}!");
+    let world = "world";
+    println!("Hello {world}!");
 }