Hello,
I would like to highlight some code not written in Rust (gdscript to be precise) in my crate's documentation, like this:
```gdscript
var some_var = 1
```
However it seems to me that rustdoc only highlight rust code: I tried c, cpp, python, lua and gdscript, and all render the same as text. Is there a way to make syntax highlighting work for non-Rust code ?