fix: upgrade docker base image to 29.3.0-dind to remediate CVE-2025-15558#95

vinayakharness2026 wants to merge 2 commits intodrone-plugins:masterdrone-plugins/drone-buildx:masterfrom

vinayakharness2026:fix/CVE-2025-15558-docker-cli-upgradevinayakharness2026/drone-buildx:fix/CVE-2025-15558-docker-cli-upgradeCopy head branch name to clipboard