build(deps): bump org.apache.maven.plugins:maven-site-plugin (#28)

Bumps the apache-maven-plugins group with 1 update: [org.apache.maven.plugins:maven-site-plugin](https://github.com/apache/maven-site-plugin).


Updates `org.apache.maven.plugins:maven-site-plugin` from 4.0.0-M13 to 4.0.0-M15
- [Commits](apache/maven-site-plugin@maven-site-plugin-4.0.0-M13...maven-site-plugin-4.0.0-M15)

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

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

pom.xml

@@ -16,7 +16,7 @@
     <maven-dependency-plugin.version>3.6.1</maven-dependency-plugin.version>
     <maven-surefire-plugin.version>3.2.5</maven-surefire-plugin.version>
     <maven-shade-plugin.version>3.5.1</maven-shade-plugin.version>
-    <maven-site-plugin.version>4.0.0-M13</maven-site-plugin.version>
+    <maven-site-plugin.version>4.0.0-M15</maven-site-plugin.version>
     <maven-assembly-plugin.version>3.7.1</maven-assembly-plugin.version>
 
     <revision>${env.KEYCLOAK_VERSION}</revision>