Bump org.jetbrains.dokka from 1.8.20 to 1.9.20 (#320)

Bumps [org.jetbrains.dokka](https://github.com/Kotlin/dokka) from 1.8.20 to 1.9.20.
- [Release notes](https://github.com/Kotlin/dokka/releases)
- [Commits](Kotlin/dokka@v1.8.20...v1.9.20)

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

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

signature-view/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
     alias(libs.plugins.kotlin.android)
     id("maven-publish")
     id("signing")
-    id("org.jetbrains.dokka") version "1.8.20"
+    id("org.jetbrains.dokka") version "1.9.20"
     id("com.gladed.androidgitversion") version "0.4.14"
     id("kotlin-kapt")
     alias(libs.plugins.io.gitlab.arturbosch.detekt)