dependency: bump nexus-staging-maven-plugin from 1.6.8 to 1.6.12#13

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dependabot/maven/org.sonatype.plugins-nexus-staging-maven-plugin-1.6.12peterdemaeyer/checkstyle:dependabot/maven/org.sonatype.plugins-nexus-staging-maven-plugin-1.6.12Copy head branch name to clipboard