chore(deps): update dependency org.jetbrains.dokka:dokka-gradle-plugin to v1.6.20

Author: renovate-bot

buildSrc/build.gradle.kts

@@ -10,7 +10,7 @@ repositories {
 val libs = extensions.getByType<VersionCatalogsExtension>().named("libs")
 dependencies {
  implementation("org.ajoberstar.reckon:reckon-gradle:0.16.1")
- implementation("org.jetbrains.dokka:dokka-gradle-plugin:1.6.10")
+ implementation("org.jetbrains.dokka:dokka-gradle-plugin:1.6.20")
  implementation("io.github.gradle-nexus:publish-plugin:1.1.0")
  implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:${libs.findVersion("kotlin").get()}")
 }