Update dependency org.apache.maven.plugins:maven-site-plugin to v3.8.2 (#753)

Author: renovate-bot

pom.xml

@@ -360,7 +360,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-site-plugin</artifactId>
-          <version>3.7.1</version>
+          <version>3.8.2</version>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>