How is the jvm list/index for .mill-jvm-version updated?

[Doikor]

How is the list used by .mill-jvm-version updated? JVM 24 has been out for some time now (and 23 in most distributions is thus EOL) but if I try to tell it to use 24 of temurin (temurin:24) I get an error that it is not found in the index.

The coursier jvm index itself has been updated with a few weeks ago https://github.com/coursier/jvm-index/blob/master/indices/darwin-arm64.json#L1142-L1143

[gamlerhart]

It downloads it from the Maven repository, as a packed JAR, as far as I can tell.
It seems to download the outdated version 0.0.4-84-f852c6 of that jar for me, that doesn't include it yet.
Not sure where that old version f852c6 comes from. I would need to investigate further.

Update: Continued investigation. So each Mill version 'burns in' a version of the JVM index it will fetch. So, Mill 0.12.4 fetches 0.0.4-84-f852c6 that doesn't include JDK 24 yet.

Not sure if that can be override.