[stdlib] Update Dokka to 2.1.0-dev-402

Author: vmishenev

libraries/tools/kotlin-stdlib-docs/gradle.properties

@@ -1,6 +1,7 @@
 org.gradle.jvmargs=-Xmx6G
-dokka_version=2.0.20-dev-394
+dokka_version=2.1.0-dev-402
 systemProp.dokka.shouldDisplaySinceKotlin=true
 systemProp.dokka.shouldDisplayAllTypesPage=true
 systemProp.org.jetbrains.dokka.analysis.allowKotlinPackage=true
-org.jetbrains.dokka.experimental.tryK2=true
+org.jetbrains.dokka.experimental.tryK2=true
+org.jetbrains.dokka.experimental.gradle.pluginMode=V1Enabled