Bump org.apache.maven.plugins:maven-site-plugin from 3.12.1 to 3.21.0#39

MikeKirillov merged 1 commit intodevelopMikeKirillov/uml-data-model-processor:developfrom

dependabot/maven/org.apache.maven.plugins-maven-site-plugin-3.21.0MikeKirillov/uml-data-model-processor:dependabot/maven/org.apache.maven.plugins-maven-site-plugin-3.21.0Copy head branch name to clipboard