bin/docgen expands curly braces, even if they are marked as code

[SimJoSt]

Syntax in recipe docs like this

`{{static_content_locales}}`

gets converted by bin/docgen to this for the docs

`[static_content_locales](/docs/recipe/magento2.md#static_content_locales)`

Maybe it could make sense to only expand curly braces, if they are not marked as code.
This is already the case, if text is part of a code block.

[antonmedv]

Makes sense.