Bump org.jetbrains.dokka:dokka-gradle-plugin from 1.9.20 to 2.0.0

Bumps [org.jetbrains.dokka:dokka-gradle-plugin](https://github.com/Kotlin/dokka) from 1.9.20 to 2.0.0.
- [Release notes](https://github.com/Kotlin/dokka/releases)
- [Commits](Kotlin/dokka@v1.9.20...v2.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle

@@ -2,7 +2,7 @@ version '1.0-SNAPSHOT'
 
 buildscript {
     ext.kotlin_version = '2.1.0'
-    ext.dokka_version = '1.9.20'
+    ext.dokka_version = '2.0.0'
     ext.bnd_version = '6.4.0'
     ext.license_version = '0.16.1'
     ext.vanniktech_version = '0.30.0'