chore(deps): update dependency org.apache.maven.plugins:maven-javadoc-plugin to v3.12.0

Author: renovate-bot

google-cloud-jar-parent/pom.xml

@@ -268,7 +268,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.11.2</version>
+        <version>3.12.0</version>
         <reportSets>
           <reportSet>
             <id>html</id>