Add header to chat-platform.md, separate lines and add direct links to streams mentioned.

Author: andrewdavidmackenzie

content/about/chat-platform.md

@@ -3,9 +3,14 @@ title: Chat platform
 type: docs
 ---
 
+# Chat Platform
+
 The compiler team hangs out in [the rust-lang Zulip][z] these days.
-Feel free to introduce yourself and say hi in the `#new-members` stream!
-The `#t-compiler/help` stream is also a great place to ask questions. 
+
+Feel free to introduce yourself and say hi in the [`#new-members`](https://rust-lang.zulipchat.com/#narrow/stream/122652-new-members) stream!
+
+The [`#t-compiler/help`](https://rust-lang.zulipchat.com/#narrow/stream/182449-t-compiler.2Fhelp) stream is also a great place to ask questions. 
+
 In addition, each working group has one or more streams where they communicate.
 
 [z]: https://rust-lang.zulipchat.com