N24: Add discussion links (#749)

Author: 17cupsofcoffee

content/news/024/index.md

@@ -759,10 +759,11 @@ or [/r/rust_gamedev subreddit][/r/rust_gamedev] if you want to receive fresh new
 
 <!--
 TODO: Add real links and un-comment once this post is published
-**Discussions of this post**:
-[/r/rust](TODO),
-[twitter](TODO).
 -->
+**Discussions of this post**:
+[/r/rust_gamedev](https://www.reddit.com/r/rust_gamedev/comments/p0hgsy/this_month_in_rust_gamedev_24_july_2021/),
+[Twitter](https://twitter.com/rust_gamedev/status/1424398304700420102),
+[Discord](https://discord.gg/yNtPTb2).
 
 [/r/rust_gamedev]: https://reddit.com/r/rust_gamedev
 [@rust_gamedev]: https://twitter.com/rust_gamedev

newsletter-template.md

@@ -113,8 +113,9 @@ or [/r/rust_gamedev subreddit][/r/rust_gamedev] if you want to receive fresh new
 <!--
 TODO: Add real links and un-comment once this post is published
 **Discussions of this post**:
-[/r/rust](TODO),
-[twitter](TODO).
+[/r/rust_gamedev](TODO),
+[Twitter](TODO),
+[Discord](https://discord.gg/yNtPTb2).
 -->
 
 [/r/rust_gamedev]: https://reddit.com/r/rust_gamedev