Fix comment referencing build.gradle file

turbo/proguard-consumer-rules.pro

@@ -1,7 +1,7 @@
 # The Android Gradle plugin allows to define ProGuard rules which get embedded in the AAR.
 # These ProGuard rules are automatically applied when a consumer app sets minifyEnabled to true.
 # The custom rule file must be defined using the 'consumerProguardFiles' property in your
-# build.gradle file.
+# build.gradle.kts file.
 
 -keepclassmembers class dev.hotwire.turbo.session.TurboSession {
     @android.webkit.JavascriptInterface <methods>;