Endpoint used to find builds is deprecated

[geoffswift]

The endpoint for the AdoptOpenJDK API is hardcoded as follows:

const staticOpenJdkUrl = 'https://api.adoptopenjdk.net/v3/binary/latest/';

Visit https://api.adoptopenjdk.net/ and you're greeted with a message:

Please migrate to api.adoptium.net
AdoptOpenJDK has moved to the Eclipse Foundation.

Could we please at least have the URL updated, and perhaps ideally let it be configurable somehow (in case we run into similar problems in the future).