Newsletter 001: Add discussion links (#20)

Author: ozkriff

_posts/2019-09-02-newsletter-001.md

@@ -540,8 +540,9 @@ Want something mentioned in the next newsletter?
 Also, subscribe to [@rust_gamedev on Twitter][@rust_gamedev]
 or [/r/rust_gamedev subreddit][/r/rust_gamedev] if you want to receive fresh news!
 
-<!-- TODO: Add real links and un-comment once post is published -->
-<!-- **Discussions of this post**: [/r/rust](), [twitter](). -->
+**Discussions of this post**:
+[/r/rust](https://www.reddit.com/r/rust/comments/cyu3zg/this_month_in_rust_gamedev_1_august_2019),
+[twitter](https://twitter.com/rust_gamedev/status/1168614980721266695).
 
 [/r/rust_gamedev]: https://reddit.com/r/rust_gamedev
 [@rust_gamedev]: https://twitter.com/rust_gamedev