Update plugin dokka to v2.1.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 kotlin = "2.2.20"
 
 [plugins]
-dokka = { id = "org.jetbrains.dokka", version = "2.0.0" }
+dokka = { id = "org.jetbrains.dokka", version = "2.1.0" }
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 kotlinx-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
 spotless = { id = "com.diffplug.spotless", version = "7.2.1" }