feat(testkit): update default testkit-support version to latest.

Author: autonomousapps

testkit/gradle-testkit-plugin/src/main/kotlin/com/autonomousapps/GradleTestKitSupportExtension.kt

@@ -261,7 +261,7 @@ public abstract class GradleTestKitSupportExtension(private val project: Project
   internal companion object {
 
     // TODO(tsr): can we inject these values so they're not hardcoded?
-    private const val DEFAULT_SUPPORT_VERSION = "0.24"
+    private const val DEFAULT_SUPPORT_VERSION = "0.25"
     private const val DEFAULT_TRUTH_VERSION = "1.7.0"
 
     fun create(project: Project): GradleTestKitSupportExtension {