Bump org.jetbrains.dokka from 1.9.10 to 1.9.20

Bumps [org.jetbrains.dokka](https://github.com/Kotlin/dokka) from 1.9.10 to 1.9.20.
- [Release notes](https://github.com/Kotlin/dokka/releases)
- [Commits](Kotlin/dokka@v1.9.10...v1.9.20)

---
updated-dependencies:
- dependency-name: org.jetbrains.dokka
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle.kts

@@ -9,7 +9,7 @@ buildscript { dependencies { classpath("org.jetbrains.dokka:dokka-base:1.9.10")
 plugins {
     kotlin("jvm") version "1.9.10"
     id("com.diffplug.spotless") version "6.22.0"
-    id("org.jetbrains.dokka") version "1.9.10"
+    id("org.jetbrains.dokka") version "1.9.20"
     application
     `maven-publish`
     signing