[MJLINK-70] update site-plugin to v3.12.1 (#164)

diff --git a/pom.xml b/pom.xml
index c2901ac..56c7cf3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -172,7 +172,7 @@
         </plugin>
         <plugin>
           <artifactId>maven-site-plugin</artifactId>
-          <version>3.9.1</version>
+          <version>3.12.1</version>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>