Don't run migrate templates to mappings if the mappings table doesn't exist · dradis/dradis-ce@5a18f7c

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.