Failed with exit code: 1

content/2.cc4k/1.index.md:20 MD022/blanks-around-headings Headings should be surrounded by blank lines [Expected: 1; Actual: 0; Above] [Context: "## v0.5.2"] https://github.com/DavidAnson/markdownlint/blob/v0.37.4/doc/md022.md

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, DavidAnson/markdownlint-cli2-action@v19. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/