Automated test jobs at $my_company curl this URL as part of their setup. These jobs now fail because of this external dependency. There's definitely a lesson here.
However I wonder how a soon-to-expire certificate goes unnoticed nowadays, with all the automation available.
We use it for our prod deploy pipeline to package the final image. Normal PRs are working because we cache the Ubuntu image, but prod deploys are fresh :(
Sooner or later, SSL expirations will come for you!