build(deps): update dependency org.apache.maven.plugins:maven-javadoc-plugin to v3.6.0 (googleapis#2628)

* build(deps): update dependency org.apache.maven.plugins:maven-javadoc-plugin to v3.6.0

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: 2 people

pom.xml

@@ -187,7 +187,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.5.0</version>
+        <version>3.6.0</version>
         <reportSets>
           <reportSet>
             <id>html</id>