feat(deps): remove node.js 21

[MikeMcC399]

According to Node.js release schedule plans, Node.js 21.x reached End-of-life status on June 1, 2024.

This PR removes Node.js 21

• from the matrix of tested nodes under .github/workflows/example-node-versions.yml and
• from the README.

Supported versions are now 18.x, 20.x and 22.x.

Version usage

There is no change to the action itself.

• cypress-io/github-action@v6 continues to use node20

See README > Usage for a more detailed explanation.

References

• Node.js Release schedule
• GitHub runs.using for JavaScript actions

[cypress-app-bot]

• Create a Draft Pull Request if your PR is not ready for review. Mark the PR as Ready for Review when you're ready for a Cypress team member to review the PR.

[github-actions[bot]]

:tada: This PR is included in version 6.7.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: