Update 2020-01-30-newsletter-23.md

Add link to Steven Walter's 2019 Rust Belt Rust talk on introducing Rust into a preexisting embedded Linux project.

Author: rubberduck203

content/2020-01-30-newsletter-23.md

@@ -49,6 +49,8 @@ If you want to mention something in [the next newsletter], send us a pull reques
 
 - [The Raspberry Pi OS dev tutorial] got a new chapter on Kernel Unit, Integration and Console tests using QEMU
 
+- Steven Walter gave a talk at [Rust Belt Rust][rust-belt-rust] about [introducing Rust into an existing embedded Linux project][introducing-rust-into-legacy].
+
 [Porting druid Rust Widgets to PineTime Smart Watch]: https://medium.com/@ly.lee/porting-druid-rust-widgets-to-pinetime-smart-watch-7e1d5a5d977a
 [Optimising PineTime’s Display Driver with Rust and Mynewt]: https://medium.com/@ly.lee/optimising-pinetimes-display-driver-with-rust-and-mynewt-3ba269ea2f5c
 [The Raspberry Pi OS dev tutorial]: https://github.com/rust-embedded/rust-raspi3-OS-tutorials/tree/master/13_integrated_testing
@@ -62,6 +64,8 @@ If you want to mention something in [the next newsletter], send us a pull reques
 [vscode-blog]: https://christopherjmcclellan.wordpress.com/2019/12/31/debugging-rust-cortex-m-with-vs-code-take-2/
 [infrared]: https://github.com/jkristell/infrared
 [infrared-blog]: https://jott.se/blog/infrared
+[introducing-rust-into-legacy]: https://www.youtube.com/watch?v=EoV94cg_Tug
+[rust-belt-rust]: http://www.rust-belt-rust.com/
 
 
 <!-- TODO Add news about embedded projects here -->