message: Add CI Timing Tracker to infrastructure list.
diff: @@ -116,4 +116,11 @@ status of every rustup component for every platform over time. See [the
  repository](https://github.com/rust-lang/rustup-components-history) for more
  information.
  +## CI Timing Tracker
  +
  +The [CI Timing
  +Tracker](https://alexcrichton.github.io/rust-ci-timing-tracker/) tracks and
  +compares how long CI jobs take over time. It is run by [Alex
  +Crichton](https://github.com/alexcrichton/rust-ci-timing-tracker).
  +
  [crates.io]: https://crates.io/
  