Bump org.jetbrains.dokka:dokka-gradle-plugin from 1.9.10 to 1.9.20 (#87)

Bumps [org.jetbrains.dokka:dokka-gradle-plugin](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:dokka-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ benchmark = "0.4.10"
 kotlin-gradle-plugin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }
 kotlin-allopen = { module = "org.jetbrains.kotlin:kotlin-allopen", version.ref = "kotlin" }
 kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test" }
-dokka-gradle-plugin = { module = "org.jetbrains.dokka:dokka-gradle-plugin", version = "1.9.10" }
+dokka-gradle-plugin = { module = "org.jetbrains.dokka:dokka-gradle-plugin", version = "1.9.20" }
 mavenPublish-gradle-plugin = { module = "com.vanniktech:gradle-maven-publish-plugin", version = "0.27.0" }
 benchmark-runtime = { module = "org.jetbrains.kotlinx:kotlinx-benchmark-runtime", version.ref = "benchmark" }
 benchmark-gradle-plugin = { module = "org.jetbrains.kotlinx:kotlinx-benchmark-plugin", version.ref = "benchmark" }