N42: Add reddit discussion link

Author: ozkriff

content/news/042/index.md

@@ -679,7 +679,7 @@ Also, subscribe to [@rust_gamedev on Twitter][@rust_gamedev]
 or [/r/rust_gamedev subreddit][/r/rust_gamedev] if you want to receive fresh news!
 
 **Discuss this post on**:
-[/r/rust_gamedev](TODO),
+[/r/rust_gamedev](https://www.reddit.com/r/rust_gamedev/comments/11cpysa/this_month_in_rust_gamedev_42),
 [Twitter](https://twitter.com/rust_gamedev/status/1629925295376441345),
 [Mastodon](https://mastodon.gamedev.place/@rust_gamedev/109932672837603113),
 [Discord](https://discord.gg/yNtPTb2).