moves issue 344 to content directory and updates a link

Signed-off-by: Nell Shamrell <[email protected]>

Author: nellshamrell

draft/2020-06-23-this-week-in-rust.md renamed to content/2020-06-23-this-week-in-rust.md

@@ -32,7 +32,7 @@ Check out [this week's *This Week in Rust Podcast*](https://rustacean-station.or
 * [SIMD library plans](https://vorner.github.io/2020/05/08/simd-library-plans.html)
 * [Tips for Faster Rust Compile Times](https://endler.dev/2020/rust-compile-times/)
 * [Rust Analyzer Changelog #30](https://rust-analyzer.github.io/thisweek/2020/06/22/changelog-30.html)
-* [Building A Blockchain in Rust & Substrate: [A Step-by-Step Guide for Developers](https://hackernoon.com/building-a-blockchain-in-rust-and-substrate-a-step-by-step-guide-for-developers-kc223ybp)
+* [Building A Blockchain in Rust & Substrate: A Step-by-Step Guide for Developers](https://hackernoon.com/building-a-blockchain-in-rust-and-substrate-a-step-by-step-guide-for-developers-kc223ybp)
 * [Dart and Rust: the async story](https://dev.to/sunshine-chain/rust-and-dart-the-async-story-3adk)
 * [Decode a certificate](https://dev.to/wayofthepie/decode-a-certificate-5903)
 * [Four Years of Rust At OneSignal](https://onesignal.com/blog/4-years-of-rust-at-onesignal/)