Fix/Vulnerable-Actions Version 2.4.0 upgrade for actions/checkout

[faisal-alvi]

Description of the Change

This PR upgrades the actions/checkout version to 2.4.0.

Verification Process

Validate that GitHub Actions work as necessary.

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Applicable Issues

n/a

Changelog Entry

Fix - Workflow files using vulnerable action actions/checkout

[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	0	N/A

• Result: ✅ success
• Annotations: 0 total

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^{Report generated by eslint-plus-action}