Fix missing examples

[txssu]

Before

After

[SteffenDE]

Thank you!

[rhcarvalho]

This is strange, I would think the documentation NPM package would support the language hint in Markdown code blocks, just as in the example here:

https://github.com/documentationjs/documentation/blob/8d029e735d2661c8f5e097c285050c7abe5edf6e/docs/NODE_API.md#examples

However, there's indeed a bug which describes exactly what we observed here documentationjs/documentation#1428.

And I confirmed that the code blocks go missing if we set the language to javascript (or anything else).

[SteffenDE]

@rhcarvalho some time I might be able to finish up #6364, then we'll have more modern docs :D

[rhcarvalho]

Wow, massive change! The UI looks the same, so perhaps the bug in only manifesting when the source code is JS, not TS?!

Would be nice to have the JS docs surfaced inside of the Elixir docs, single experience! But that might require yet another massive lift.

Hey, thanks for the good work in Phoenix! Upgrading to 1.8 and LV 1.1 was smooth (other than self-inflicted small mistakes on my side, promptly fixed).