Bump maven-site-plugin from 3.11.0 to 3.12.0 (#7903)

Bumps [maven-site-plugin](https://github.com/apache/maven-site-plugin) from 3.11.0 to 3.12.0.
- [Release notes](https://github.com/apache/maven-site-plugin/releases)
- [Commits](apache/maven-site-plugin@maven-site-plugin-3.11.0...maven-site-plugin-3.12.0)

---
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]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -122,7 +122,7 @@
     <maven.remote-resources.plugin.version>1.7.0</maven.remote-resources.plugin.version>
     <maven.resources.plugin.version>3.2.0</maven.resources.plugin.version>
     <maven.shade.plugin.version>3.3.0</maven.shade.plugin.version>
-    <maven.site.plugin.version>3.11.0</maven.site.plugin.version>
+    <maven.site.plugin.version>3.12.0</maven.site.plugin.version>
     <maven.source.plugin.version>3.2.1</maven.source.plugin.version>
     <maven.war.plugin.version>3.3.2</maven.war.plugin.version>
     <maven.install.plugin.version>3.0.0-M1</maven.install.plugin.version>