Bump dokka-maven-plugin from 1.4.20 to 1.4.30

Bumps [dokka-maven-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)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

pom.xml

@@ -119,7 +119,7 @@
         <plugin>
           <groupId>org.jetbrains.dokka</groupId>
           <artifactId>dokka-maven-plugin</artifactId>
-          <version>1.4.20</version>
+          <version>1.4.30</version>
         </plugin>
       </plugins>
     </pluginManagement>