Update the list of supported languages for `lang`

[cwickham]

What would you like to do?

Report an issue on quarto.org

Description

We have a list of " full translations available" at https://quarto.org/docs/authoring/language.html#lang-option

This list appears to be out of date compared to https://github.com/quarto-dev/quarto-cli/tree/main/src/resources/language