dependabot maven(deps): bump maven-site-plugin from 3.12.0 to 3.12.1

Bumps maven-site-plugin from 3.12.0 to 3.12.1.

Commits

• ecae28f [maven-release-plugin] prepare release maven-site-plugin-3.12.1
• d98569b [MSITE-908] Upgrade Maven Reporting API to 3.1.1
• bd3376f [MSITE-901] If precending standalone report has been run, site:jar does not r...
• b99c0ef [MSITE-902] Upgrade Plexus Utils to 3.4.2
• 3c6ff2e Update CI URL
• f314e9d [MSITE-898] Upgrade Parent to 36
• bce7458 [MSITE-897] Upgrade Plexus Archiver to 4.2.7
• 3c8d426 keep only release month, drop day
• 6604ab3 also keep only Doxia versions changes
• 789a7a1 lighten content: keep only meaningful values
• Additional commits viewable in compare view