Bump maven-javadoc-plugin from 3.3.2 to 3.4.0

Bumps [maven-javadoc-plugin](https://github.com/apache/maven-javadoc-plugin) from 3.3.2 to 3.4.0.
- [Release notes](https://github.com/apache/maven-javadoc-plugin/releases)
- [Commits](apache/maven-javadoc-plugin@maven-javadoc-plugin-3.3.2...maven-javadoc-plugin-3.4.0)

---
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] <support@github.com>

pom.xml

@@ -54,7 +54,7 @@
     <maven-install-plugin.version>3.0.0-M1</maven-install-plugin.version>
     <maven-invoker-plugin.version>3.2.2</maven-invoker-plugin.version>
     <maven-jar-plugin.version>3.2.2</maven-jar-plugin.version>
-    <maven-javadoc-plugin.version>3.3.2</maven-javadoc-plugin.version>
+    <maven-javadoc-plugin.version>3.4.0</maven-javadoc-plugin.version>
     <maven-jdeps-plugin.version>3.1.2</maven-jdeps-plugin.version>
     <maven-jxr-plugin.version>3.2.0</maven-jxr-plugin.version>
     <maven-plugin-plugin.version>3.6.4</maven-plugin-plugin.version>