The scala3 migration plugin gave a false suggestion for how to migrate Akka libraries. Instead of saying that the latest 2.9.4 version was a valid scala 3 library it suggested to downgrade to a version as early as 2.6.18 up to the version 2.9.0-M2. These version are the ones that are published to the maven central that this plugin are hard coded to. Later version of akka are published to https://repo.akka.io/maven.

This patch is using the configured repository in the sbt build to resolve the dependencies and are thereby able to find the correct versions.

Now:
```
sbt:test-project>  migrateDependencies test-project
[info]
[info] Starting migration of libraries and compiler plugins in project 'test-project'
[info]
[info] Valid dependencies:
...
[info] "com.typesafe.akka" %% "akka-cluster-typed" % "2.9.4"
...
```

Before this commit, older akka versions published to maven central was suggested by the migration tool
```
[warn] Versions to update:
...
[warn] "com.typesafe.akka" %% "akka-cluster-typed" % "2.6.17" (Other versions: 2.6.18, ..., 2.9.0-M2)
...

```