add support for JDK 21 on various distributions

[ckipp01]

This also updates the deps, scala-cli script, and scalafmt

[ckipp01]

@alexarchambault if you want I'm also happy to help maintain this repo since I use cs to manage my java versions locally. That way we can have multiple eyes on things and it doesn't have to all be on your shoulders.

[carlosedp]

Not totally related to this PR but should we also add to the index Oracle JDKs from https://www.oracle.com/java/technologies/downloads/ ?

[alexarchambault]

@ckipp01 Just sent you an invite to have write access to this repo. PRs updating the index need to be approved (by a maintainer) before being merged (squash-and-merge). I usually do a visual quick check that all new URLs look legit.

[alexarchambault]

@carlosedp It'd be great to have those. I'm not sure how stable those URLs are though (it'd be better if they don't disappear in the future), and how to automate adding them to the index.

[alexarchambault]

Thanks for this @ckipp01!

[carlosedp]

Sorry to pollute this now closed PR, I might open one adding GraalVM ones.
According to GraalVM's blog post, the have "stable scriptable URLs". So I believe the plan is to keep they working :)

Ref: https://medium.com/graalvm/a-new-graalvm-release-and-new-free-license-4aab483692f5

[alexarchambault]

Per https://www.oracle.com/java/technologies/jdk-script-friendly-urls/, linked in the blog post you mentioned, not only GraalVM, but also standard JDKs are available this way. This page also mentions the lifetime of those URLs (which should be fine for us).

[carlosedp]

I tried cs java --available --update --ttl 0 | grep graal but java21 still doesn't show in the index.
Anything missing?