change the lesson 004 goal and 004 example name

Author: Lokathor

examples/004-shader-basics.rs renamed to examples/004-shader-pipeline.rs

@@ -3,7 +3,7 @@
 #![allow(clippy::single_match)]
 #![allow(clippy::zero_ptr)]
 
-const WINDOW_TITLE: &str = "Shader Basics";
+const WINDOW_TITLE: &str = "Shader Pipeline";
 
 use beryllium::*;
 use core::{