deps: update dependency org.apache.maven.plugins:maven-site-plugin to v3.9.0 (#103)

Author: renovate-bot

pom.xml

@@ -170,7 +170,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-site-plugin</artifactId>
-          <version>3.8.2</version>
+          <version>3.9.0</version>
           <configuration>
             <skipDeploy>true</skipDeploy>
           </configuration>