Bump org.jetbrains.dokka from 1.9.20 to 2.0.0 (#256)

Bumps [org.jetbrains.dokka](https://github.com/Kotlin/dokka) from 1.9.20 to 2.0.0.
- [Release notes](https://github.com/Kotlin/dokka/releases)
- [Commits](https://github.com/Kotlin/dokka/commits)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -4,7 +4,7 @@
 markdown = "0.7.3"
 
 # plugins
-dokka = "1.9.20"
+dokka = "2.0.0"
 
 gradlePluginPublish = "1.3.0"
 gradleChangelogPlugin = "2.2.1"