Bump org.apache.maven.plugins:maven-site-plugin from 3.7.1 to 3.21.0#20

dependabot[bot] wants to merge 2 commits intodevelopmentsplitio/split-openfeature-provider-java:developmentfrom

dependabot/maven/org.apache.maven.plugins-maven-site-plugin-3.21.0splitio/split-openfeature-provider-java:dependabot/maven/org.apache.maven.plugins-maven-site-plugin-3.21.0Copy head branch name to clipboard