Update dependency org.jetbrains.dokka:dokka-gradle-plugin from 1.7.10…

… to 1.7.20 (#315)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -38,7 +38,7 @@ kotlin-language = "1.4"
 # Version of Kotlin Gradle Plugin used for compilation.
 kotlin-build = "1.7.20"
 # Dokka is sometimes lagging behind and is not using the same release vehicle as Kotlin main.
-kotlin-dokka = "1.7.10"
+kotlin-dokka = "1.7.20"
 
 # TODO 1.22 activate UnnecessaryParentheses with allowForUnclearPrecedence.
 # TODO 1.22 remove MaxLineLength from LintMessageDetailsSplitter