Update dependency org.apache.maven.plugins:maven-javadoc-plugin to v3.6.0

Author: renovate[bot]

pom.xml

@@ -51,7 +51,7 @@
     <asciidoctor-extensions-spring-boot>0.6.2</asciidoctor-extensions-spring-boot>
     <maven-deploy-plugin.version>3.1.1</maven-deploy-plugin.version>
     <maven-gpg-plugin.version>3.1.0</maven-gpg-plugin.version>
-    <maven-javadoc-plugin.version>3.5.0</maven-javadoc-plugin.version>
+    <maven-javadoc-plugin.version>3.6.0</maven-javadoc-plugin.version>
     <maven-source-plugin.version>3.3.0</maven-source-plugin.version>
     <maven-surefire-plugin.version>3.1.2</maven-surefire-plugin.version>
     <maven-shade-plugin.version>3.5.0</maven-shade-plugin.version>