Bump org.apache.maven.plugins:maven-site-plugin from 3.20.0 to 3.21.0 (…

…#545)

Co-authored-by: Boni Garcia <[email protected]>

pom.xml

@@ -30,7 +30,7 @@
         <exec-maven-plugin.version>3.0.0</exec-maven-plugin.version>
         <maven-asciidoctor-plugin.version>3.0.0</maven-asciidoctor-plugin.version>
         <asciidoctorj-pdf.version>2.3.19</asciidoctorj-pdf.version>
-        <maven-site.version>3.20.0</maven-site.version>
+        <maven-site.version>3.21.0</maven-site.version>
         <maven-project-info-reports.version>3.7.0</maven-project-info-reports.version>
         <maven-javadoc-plugin.version>3.10.1</maven-javadoc-plugin.version>