Bump kotlin versions.

Author: nedtwigg

src/main/resources/plugin-kotlin.versions

@@ -1,10 +1,10 @@
 	// https://plugins.gradle.org/plugin/org.jetbrains.dokka
 	id 'org.jetbrains.dokka'                       version '1.9.20' apply false
 	// https://plugins.gradle.org/plugin/org.jetbrains.kotlin.jvm
-	id 'org.jetbrains.kotlin.jvm'                  version '2.0.0' apply false
+	id 'org.jetbrains.kotlin.jvm'                  version '2.0.20' apply false
 	// https://plugins.gradle.org/plugin/org.jetbrains.kotlin.plugin.serialization
-	id 'org.jetbrains.kotlin.plugin.serialization' version '2.0.0' apply false
+	id 'org.jetbrains.kotlin.plugin.serialization' version '2.0.20' apply false
 	// https://plugins.gradle.org/plugin/org.jetbrains.kotlin.multiplatform
-	id 'org.jetbrains.kotlin.multiplatform' version '2.0.0' apply false
+	id 'org.jetbrains.kotlin.multiplatform' version '2.0.20' apply false
 	// https://github.com/adamko-dev/dokkatoo/releases
 	id 'dev.adamko.dokkatoo-html' version '2.3.1' apply false