[Bug]: Updating dependencies adds non-existent version for org.jetbrains.kotlinx:kotlinx-collections-immutable

[dturner]

Steps to repro:

Run ./JetNews/gradlew -p ./JetNews versionCatalogUpdate (this command is taken from scripts/updateDeps.sh).

This will update the library version for kotlinx_immutable to 1.9.0 which doesn't exist (latest version is 0.3.8). The build will then fail.

Cause:

In libs.versions.toml the kotlinx_immutable version variable is also used for kotlinx-coroutines-test. This is incorrect.