Fix nuxeo/nuxeo-jsf-ui release pipeline

The release pipeline is currently relying on the Maven goal versions:update-parent to update the parent version to the latest SNAPSHOT version of nuxeo/nuxeo.

However, if the release of Nuxeo JSF UI finished before having a new SNAPSHOT version of org.nuxeo:nuxeo-parent, we end up fixing the version to 11.2, see: https://github.com/nuxeo/nuxeo-jsf-ui/commit/c24b597316361250d565f614f23a9f8838705fa6

Do not rely anymore on versions:update-parent to bump the master branch version, but do it manually as it's done in the release of nuxeo/nuxeo.