Bump org.apache.maven.plugins:maven-site-plugin from 3.12.1 to 3.20.0

Bumps [org.apache.maven.plugins:maven-site-plugin](https://github.com/apache/maven-site-plugin) from 3.12.1 to 3.20.0.
- [Release notes](https://github.com/apache/maven-site-plugin/releases)
- [Commits](apache/maven-site-plugin@maven-site-plugin-3.12.1...maven-site-plugin-3.20.0)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-site-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -52,7 +52,7 @@
         <!---->
         <!---->
         <!--maven plugins versions-->
-        <maven-site-plugin.version>3.12.1</maven-site-plugin.version>
+        <maven-site-plugin.version>3.20.0</maven-site-plugin.version>
         <maven-project-info-reports-plugin.version>3.6.2</maven-project-info-reports-plugin.version>
         <maven-javadoc-plugin.version>3.8.0</maven-javadoc-plugin.version>
         <maven-deploy-plugin.version>3.1.2</maven-deploy-plugin.version>