Update linting workflow and actions

[jackspiering]

Updated the linting workflow to use a newer checkout action and markdown linting action. Removed commented README.md path from ignore list.

Pull Request Title: [Short Description of Changes]

Description

Provide a brief description of the changes made in this pull request. Include the following:

• The purpose of the changes
• Any background context or additional details

Related Issues

• Issue #[issue number] (e.g., Fixes #[issue number])

Type of Change

• Bug fix
• New feature
• Documentation update
• Refactoring

How Has This Been Tested?

Describe the tests you ran to verify your changes. Provide instructions for reproducing the testing process:

1. [Test case 1]
2. [Test case 2]

Checklist

• I have performed a self-review of my code
• I have added tests that prove my fix or feature works
• I have updated necessary documentation (e.g. frontpage README.md)
• Any dependent changes have been merged and published in downstream modules

Screenshots (if applicable)

If visual changes are made, include screenshots to demonstrate them.

Additional Notes

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