Starting with Java 20, instantiating URLs via new URL is deprecated in favor of URI#toURL().

While the project's codebase targets Java 11, we can address backwards-compatible deprecations still. The methods to use exist in Java 11 as well.

The following occurrences are of concern: https://github.com/search?q=repo%3Ajenkinsci%2Fjenkins+%22new+URL%22+lang%3Ajava&type=code

More information about the deprecation can be found in the javadocs and constructor deprecation.