Fix test-runner module default Scala version to 3.0.2 (to match the standard runner)

Author: Gedochao

build.sc

@@ -93,7 +93,7 @@ object `build-module` extends Cross[Build](Scala.scala3MainVersions)
     with CrossScalaDefaultToInternal
 object runner        extends Cross[Runner](Scala.runnerScalaVersions) with CrossScalaDefaultToRunner
 object `test-runner` extends Cross[TestRunner](Scala.testRunnerScalaVersions)
-    with CrossScalaDefaultToInternal
+    with CrossScalaDefaultToRunner
 object `tasty-lib` extends Cross[TastyLib](Scala.all) with CrossScalaDefaultToInternal
 // Runtime classes used within native image on Scala 3 replacing runtime from Scala
 object `scala3-runtime` extends Cross[Scala3Runtime](Scala.scala3MainVersions)