Update dependency org.apache.maven.plugins:maven-javadoc-plugin to v3.6.3

Author: renovate[bot]

Diff for: pom.xml

@@ -311,7 +311,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-javadoc-plugin</artifactId>
-                    <version>3.6.2</version>
+                    <version>3.6.3</version>
                     <configuration>
                         <source>8</source>
                         <doclint>none</doclint>