bump-node-major.md

How to bump Renovate to next NodeJS LTS release

Add new NodeJS version

• Add new version via package.json>engines>node and package.json>engines-next>node
• Update the node version in the local-development docs
• Update the node version in the GitHub Actions workflow files

Deprecate old NodeJS version

• Deprecate old LTS via package.json>engines-next>node
• Update the node version in the local-development docs
• Remove the old node version in the GitHub Actions workflow files

Remove old NodeJS version

• Update package.json>engines>node
• Mark PR as BREAKING by:
  • Adding the label breaking to the PR
  • Putting the text BREAKING CHANGE: <breaking cause> in the PR content footer