Use correct geoserver version numbering scheme

[sebr72]

No description provided.

[sbrunner]

in https://github.com/mapfish/mapfish-print/blob/master/.github/renovate.json5 you should add something like in projectRules:

{
      matchDatasources: ['docker'],
      matchDepNames: ['georchestra/geoserver'],
      allowedVersions: '/[0-9]+\.[0-9]+\.[0-9]+-georchestra-[0-9]+$/',
      versioning: 'regex:^(?<major>\\d+)\\.(?<minor>\\d+)\\.(?<patch>\\d+)(-(?<compatibility>.*))?$',
}

To don't have again a proposition to upgrade to version 25