refactor: Comment out Dokka V2 migration helper

The project is not yet ready for migration to Dokka V2, so the
experimental Gradle plugin mode for V2 with helpers has been
commented out in `gradle.properties`.

Author: wax911

gradle.properties

@@ -19,4 +19,5 @@ android.enableJetifier=true
 kotlin.code.style=official
 
 # https://kotlinlang.org/docs/dokka-migration.html#enable-migration-helpers
-org.jetbrains.dokka.experimental.gradle.pluginMode=V2EnabledWithHelpers
+# Will enable when ready to migrade
+#org.jetbrains.dokka.experimental.gradle.pluginMode=V2EnabledWithHelpers