Bump org.jetbrains.dokka from 1.9.20 to 2.0.0

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](Kotlin/dokka@v1.9.20...v2.0.0)

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

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

build.gradle.kts

@@ -10,7 +10,7 @@ plugins {
     id("signing")
     id("maven-publish")
     id("org.jetbrains.kotlinx.kover") version "0.8.3"
-    id("org.jetbrains.dokka") version "1.9.20"
+    id("org.jetbrains.dokka") version "2.0.0"
 }
 
 group = "com.westy92.holiday-event-api"