Bump org.apache.maven.plugins:maven-javadoc-plugin from 3.5.0 to 3.6.0

Bumps [org.apache.maven.plugins:maven-javadoc-plugin](https://github.com/apache/maven-javadoc-plugin) from 3.5.0 to 3.6.0.
- [Release notes](https://github.com/apache/maven-javadoc-plugin/releases)
- [Commits](apache/maven-javadoc-plugin@maven-javadoc-plugin-3.5.0...maven-javadoc-plugin-3.6.0)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-javadoc-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -28,7 +28,7 @@
         <slf4j.version>1.7.12</slf4j.version>
 
         <checkstyle.version>3.3.0</checkstyle.version>
-        <javadoc.version>3.5.0</javadoc.version>
+        <javadoc.version>3.6.0</javadoc.version>
         <pmd.version>3.21.0</pmd.version>
         <jdepend.version>2.0</jdepend.version>
         <project.info.version>3.4.5</project.info.version>