/usr/local/lib/node_modules/corepack/dist/lib/corepack.cjs:23509 throw new UsageError(`This project is configured to use ${result.spec.name} because ${result.target} has a "packageManager" field`); ^ UsageError: This project is configured to use yarn because /home/runner/work/slidev-theme-penguin/slidev-theme-penguin/package.json has a "packageManager" field at Engine.findProjectSpec (/usr/local/lib/node_modules/corepack/dist/lib/corepack.cjs:23509:21) at async Engine.executePackageManagerRequest (/usr/local/lib/node_modules/corepack/dist/lib/corepack.cjs:23539:24) at async Object.runMain (/usr/local/lib/node_modules/corepack/dist/lib/corepack.cjs:24232:5) { clipanion: { type: 'usage' } } Node.js v20.17.0

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/