If you're not updating the PHP/Node.js library, and you're not updating any data you give it, where does it get the information it needs to update the URL/SRI t

If you're not updating the PHP/Node.js library, and you're not updating any data you give it, where does it get the information it needs to update the URL/SRI tag? And if you are doing any of those things when Stripe pushes an update, how is it any different that having to update the URL/SRI tag?