`flutter --version` should say "__ ago" for `Engine` as well

```sh
% flutter --version
Flutter 3.30.0-1.0.pre.214 • channel main • unknown source
Framework • revision 39b4951f8f (22 hours ago) • 2025-02-18 13:42:53 -0800
Engine • revision 09fdf159b9
Tools • Dart 3.8.0 (build 3.8.0-91.0.dev) • DevTools 2.43.0
```

If we had added `___ hours ago for Engine` I would have noticed that it's over a week old :(