Bump dokka-gradle-plugin from 1.4.20 to 1.4.30 in /library (#112)

Bumps [dokka-gradle-plugin](https://github.com/Kotlin/dokka) from 1.4.20 to 1.4.30.
- [Release notes](https://github.com/Kotlin/dokka/releases)
- [Commits](Kotlin/dokka@v1.4.20...v1.4.30)

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library/gradle/dependencies.gradle

@@ -49,7 +49,7 @@ ext.libs = [
  ],
  ],
  "dokka": [
- "gradlePlugin": "org.jetbrains.dokka:dokka-gradle-plugin:1.4.20",
+ "gradlePlugin": "org.jetbrains.dokka:dokka-gradle-plugin:1.4.30",
  "gradlePluginId": "org.jetbrains.dokka",
  ],
  "kotest": [