Add to Observation/Thoughts - RKL: A Docker-like Command-line Interface Built in Rust (#6924)

* Update 2025-08-20-this-week-in-rust.md

* Update 2025-08-20-this-week-in-rust.md

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Co-authored-by: Ben Dillon <[email protected]>

Author: erasernoob

draft/2025-08-20-this-week-in-rust.md

@@ -66,6 +66,7 @@ and just ask the editors to select the category.
 * [Nine Rules for Generalizing Your Rust Library: Lessons from Extending RangeSetBlaze to Maps (Part 2)](https://medium.com/@carlmkadie/92bb899d47ef)
 * [Lessons learned from rewriting the UltraGraph crate](https://deepcausality.com/blog/lessons-learned-from-rewriting-ultragraph) 
 * [Scientific Computing in Rust](https://ideas.reify.ing/en/blog/scientific-computing-in-rust-with-pytorch/)
+* [RKL: A Docker-like Command-line Interface Built in Rust](https://r2cn.dev/blog/rkl-a-docker-like-command-line-interface-built-in-rust)
 
 ### Rust Walkthroughs
 * [Constructor Best Practices in Rust](https://blog.cuongle.dev/p/constructor-best-practices-in-rust)