What are the consequences if I ignore this warning and upgrade Node.js to a future version?

If you do not address the warning and upgrade your Node.js runtime, your application will likely crash with an unhandled `TypeError` (specifically, an 'Invalid URL' error from `new URL()`) at the point where the non-compliant URL is encountered. This will halt the execution of your application, leading to service disruption, unexpected downtime, or critical failures depending on the context of the URL usage.