Update node Docker tag to v21 #652

Update node Docker tag to v21

Usage Workflow file

6 warnings

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

Application uses deprecated job exclusion. Please modify the job exclusion for the job "README Linting [7.4, locked]" appropriately.

Application uses deprecated job exclusion. Please modify the job exclusion for the job "PHPUnit [7.4, locked]" appropriately.

Application uses deprecated job exclusion. Please modify the job exclusion for the job "PHPUnit [7.4, latest]" appropriately.

Application uses deprecated job exclusion. Please modify the job exclusion for the job "Codeception [7.4, locked]" appropriately.

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/