message: Infra discussion now on Zulip, not Discord.
diff: Most services in the Rust Infrastructure are deployed via
  [rust-central-station]. Questions about infrastructure, including current
  -status, should go to the [#infra Discord channel](https://discord.gg/rust-lang).
  +status, should go to the [#t-infra Zulip stream](https://rust-lang.zulipchat.com/#narrow/stream/242791-t-infra).
  **Our stability guarantees**: many of our services rely on publicly-accessible
  storage and APIs, but not all of these are intended for public consumption. At
  