No, it will not break. When you create an FAQ article, the original link that is generated for that FAQ can be used permanently going forward. We do generate new permalinks when edits are made to the FAQ’s title; however, the original URL will remain live and will redirect if the title or location of the FAQ changes. This link will always show the most recent updates to the FAQ.
The permalink to an FAQ can be found at the bottom of the page to the right of the ‘updated’ timestamp.