Update plugin dokka to v2 (#662)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -25,5 +25,5 @@ kotlinJvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 grammarKitComposer = { id = "com.alecstrong.grammar.kit.composer", version = "0.1.12" }
 spotless = { id = "com.diffplug.spotless", version = "7.0.2" }
 mavenPublish = { id = "com.vanniktech.maven.publish", version = "0.31.0" }
-dokka = { id = "org.jetbrains.dokka", version = "1.9.20" }
+dokka = { id = "org.jetbrains.dokka", version = "2.0.0" }
 intellij = { id = "org.jetbrains.intellij", version = "1.17.4" }