Bump org.apache.maven.plugins:maven-javadoc-plugin from 2.9.1 to 3.11.2 (#700)

Author: dependabot[bot]

pom.xml

@@ -440,7 +440,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-                        <version>2.9.1</version>
+                        <version>3.11.2</version>
                         <executions>
                             <execution>
                                 <id>attach-javadocs</id>