Update dependency org.jetbrains.dokka to v2

Author: renovate[bot]

gradle/libs.versions.toml

@@ -14,7 +14,7 @@ kover = { id = "org.jetbrains.kotlinx.kover", version.ref = "kover" }
 annotations = "26.0.2"
 
 # plugins
-dokka = "1.8.10"
+dokka = "2.1.0"
 kotlin = "2.3.0"
 ##  ⬆ = "2.3.10-RC"
 ##  ⬆ = "2.3.20-Beta1"