Merge pull request #4255 from bahelms/add-ray-tracer-part3-to-walkthroughs

Add ray tracer part 3 to walkthroughs

Author: bennyvasquez

draft/2023-04-12-this-week-in-rust.md

@@ -64,6 +64,7 @@ and just ask the editors to select the category.
 * [Understanding tracing's macros by rebuilding them from scratch](https://dietcode.io/p/tracing-macros)
 * [A guide to aid you in your journey of becoming a Rustacean](https://rust-lang.guide/)
 * [Flexible Tracing with Rust and OpenTelemetry](https://broch.tech/posts/rust-tracing-opentelemetry/)
+* [Build a Ray Tracer, pt. 3 - Let There Be Light!](https://www.superperfundo.dev/articles/ray-tracer-part3)
 * [video] [Rust Axum Full Course - Web Development](https://www.youtube.com/watch?v=XZtlD_m59sM)
 * [video] [Introduction to Rust Programming language](https://www.youtube.com/watch?v=9ziaSnqL8RY)