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

Bumps [org.jetbrains.dokka:dokka-maven-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-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

build-parent/pom.xml

@@ -21,7 +21,7 @@
         <!-- These properties are needed in order for them to be resolvable by the generated projects -->
         <compiler-plugin.version>${version.compiler.plugin}</compiler-plugin.version>
         <kotlin.version>2.0.21</kotlin.version>
-        <dokka.version>1.9.20</dokka.version>
+        <dokka.version>2.0.0</dokka.version>
         <scala.version>2.13.12</scala.version>
         <scala-maven-plugin.version>4.9.2</scala-maven-plugin.version>
         <!-- not pretty but this is used in the codestarts and we don't want to break compatibility -->