Remove use of set-output command

[desrosj]

Proposed changes

This removes all occurrences of the set-output command from GitHub Actions workflows to ensure workflows continue to work in the future.

This command has been deprecated by GitHub with plans to remove it at a future date when overall usage falls below an acceptable threshold.

See also the Setting an output parameter section of the GitHub Actions documentation.

Production

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update
• Refactoring / housekeeping (changes to files not directly related to functionality)

Development

• Tests
• Dependency update
• Environment update / refactoring
• Documentation Update
• Build/Test Tooling update

Checklist

• I have read the CONTRIBUTING doc
• I have viewed my change in a web-browser
• Linting and tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[Copilot]

Pull Request Overview

This pull request refactors the GitHub Actions workflow by removing the deprecated "set-output" command to ensure future compatibility.

• Replace the deprecated command with the recommended output redirection using $GITHUB_OUTPUT.