Update validate_pr.yml workflow to install latest ansible-core 2.12.*#138

wmudge merged 1 commit intocloudera-labs:develcloudera-labs/cloudera.cluster:develfrom

wmudge:fix/validate_pr-update-ansible-core-point-releaseswmudge/cloudera.cluster:fix/validate_pr-update-ansible-core-point-releasesCopy head branch name to clipboard