Update plugin dokka to v1.9.20 (#224)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ ksp = "1.9.22-1.0.18"
 [plugins]
 buildconfig = { id = "com.github.gmazzo.buildconfig", version = "3.1.0" }
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
-dokka = { id = "org.jetbrains.dokka", version = "1.9.10" }
+dokka = { id = "org.jetbrains.dokka", version = "1.9.20" }
 ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }
 mavenPublish = { id = "com.vanniktech.maven.publish", version = "0.27.0" }