[K2/N] Add comment to trigger K/N CI

^KT-56065
diff --git a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/driver/phases/FirFrontend.kt b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/driver/phases/FirFrontend.kt
index 7e6236f..f387d95 100644
--- a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/driver/phases/FirFrontend.kt
+++ b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/driver/phases/FirFrontend.kt
@@ -24,7 +24,7 @@
         outputIfNotEnabled = { _, _, _, _ -> FirOutput.ShouldNotGenerateCode }
 ) { context: PhaseContext, input: KotlinCoreEnvironment ->
     if (input.configuration.getBoolean(CommonConfigurationKeys.USE_LIGHT_TREE)) {
-        context.firFrontendWithLightTree(input)
+        context.firFrontendWithLightTree(input) // should be default
     } else {
         context.firFrontendWithPsi(input)
     }