Adjust Sonatype snapshots repository

[Gedochao]

Version(s)
1.8.3

Describe the bug

//> using repository snapshots

the directive does not point to the new Sonatype Central Portal snapshots, only the legacy ones.

To Reproduce
Try to use any snapshot published to sonatype after 30.06.2025

Expected behaviour
Scala CLI should add https://central.sonatype.com/repository/maven-snapshots/

Known workarounds

//> using repository https://central.sonatype.com/repository/maven-snapshots/

Extra context

• raised on discord: https://discord.com/channels/632150470000902164/901153021638082660/1394359234115932271
• https://central.sonatype.org/publish/publish-portal-snapshots/#publishing-via-other-methods
• https://docs.gradle.org/current/userguide/publishing_maven.html#publishing_maven:snapshot_and_release_repositories