Broken styling of code snippets in `docs/demos/lots-of-data` and `docs/demos/lots-of-data-no-virtualization`

[johanrd]

1. Go here: https://ember-headless-table.pages.dev/docs/demos/lots-of-data https://ember-headless-table.pages.dev/docs/demos/lots-of-data-no-virtualization

See that the styling of the code snippets are not as expected from the other sections: