Add entry to "A length-indexed Vector in Rust - Part 2"

Follow up of #6398.

Author: guilleme-90

draft/2025-02-26-this-week-in-rust.md

@@ -39,6 +39,8 @@ and just ask the editors to select the category.
 
 ### Observations/Thoughts
 
+* [A length-indexed Vector in Rust - Part 2](https://rvarago.github.io/a-length-indexed-vector-in-rust-part-2/)
+
 ### Rust Walkthroughs
 
 ### Research