syntax highlighting only working for rust

[ettoreleandrotognoli]

I'm having this waning log:

Could not find the language 'cpp', did you forget to load/include a language module? [lib.js:152:25938](http://localhost:3000/quiz/lib.js)
Falling back to no-highlight mode for this block. 
<code class="language-cpp">
[lib.js:152:25973](http://localhost:3000/quiz/lib.js)

My question:

[[questions]]
type = "MultipleChoice"
prompt.prompt = """
```cpp
int x = 0;
```
"""

I have the same error with python too.
I think it is because the code only imports rust:

mdbook-quiz/js/packages/quiz/src/components/snippet.tsx

Line 6 in b000274

import rust from "highlight.js/lib/languages/rust";

And indeed for rust the highlight is working