Update GitHub Actions Workflows to Use Node.js 20

[dishi1805]

Description

Node.js 16 actions are deprecated. We need to update the actions in our GitHub workflows to use Node.js 20.

Category

This is an issue with:

• improvement (improve docs content or format)

Expected behavior

Update the GitHub Actions workflows to use Node.js 20 to avoid deprecation warnings and ensure compatibility.

Current behavior

Our GitHub Actions workflows currently use Node.js 16, which is now deprecated.

Screenshots

Additional context

https://github.com/sensu/sensu-docs/actions/runs/8897562062