Dotty highlighting for Scala sources?

Currently, Scala 3 "Dotty" highlighting is activated only if the sources are marked as `dotty`:
```
```dotty
```

In my case, the problem is that this doesn't work with mdoc:
```
```dotty mdoc
```

I'm not sure if there's any good way to resolve this, without sacrificing either Scala 2 or Scala 3 syntax highlighting.