Update plugin dokka to v2.1.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -12,7 +12,7 @@ kotlin = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
 conveyor = { id = "dev.hydraulic.conveyor", version = "1.12" }
 spotless = { id = "com.diffplug.spotless", version = "8.1.0" }
-dokka = { id = "org.jetbrains.dokka", version = "2.0.0" }
+dokka = { id = "org.jetbrains.dokka", version = "2.1.0" }
 
 [libraries]
 # core functionality