Link to new Compiler Adventures episode in Walkthroughs

This is a continuation of the series that's been in past editions of This Week in Rust. Episode 2 was linked here: https://github.com/rust-lang/this-week-in-rust/blob/c88b2d13c7f5dd1d62942df3db15806aa9c3f0a6/content/2022-02-23-this-week-in-rust.md

Author: obi1kenobi

draft/2022-05-18-this-week-in-rust.md

@@ -41,6 +41,7 @@ and just ask the editors to select the category.
 * [video] [Building a Postgres storage system in Rust](https://www.youtube.com/watch?v=kAQeout-mh8)
 
 ### Rust Walkthroughs
+* [Compiler Adventures, part 3: Value Numbering](https://medium.com/@predrag.gruevski/compiler-adventures-part-3-value-numbering-12d087b891bd)
 
 ### Research