Merge pull request #2247 from jared-s/ockam_walkthrough

Add new walkthrough for end-to-end encryption using ockam crate

Author: nellshamrell

draft/2021-08-04-this-week-in-rust.md

@@ -26,6 +26,7 @@ If you find any errors in this week's issue, [please submit a PR](https://github
 
 ### Rust Walkthroughs
 * [Implementing Base64 from scratch with Rust](https://dev.to/tiemen/implementing-base64-from-scratch-in-rust-kb1)
+* [How I built End-to-End Encrypted Messaging in 51 lines of Rust, using the Ockam crate](https://github.com/ockam-network/ockam/tree/develop/documentation/use-cases/end-to-end-encryption-with-rust#readme)
 
 ### Research