Fix: Update label automation workflow for better reliability

[morningstarxcdcode]

• Updated the label automation workflow to fix action errors and ensure compatibility with current repository structure.
• Removed hypothetical AI integration and improved config referencing.
• Ensured all jobs and environment variables are correctly set.

[Copilot]

Pull Request Overview

This PR enhances the label automation workflow by updating token syntax, removing unsupported AI-driven label suggestions, and clarifying configuration guidance with comments.

• Standardize repo-token syntax to remove unnecessary quotes
• Remove the hypothetical suggest_labels job and streamline remaining jobs
• Add explanatory comments recommending supported alternatives for label suggestions

Comments suppressed due to low confidence (2)

.github/workflows/label.yml:81

• [nitpick] This comment is quite generic—consider linking to specific, supported GitHub Marketplace actions (e.g., actions/labeler) to help future maintainers select a valid solution.

  # Removed suggest_labels job because the AI-driven label suggestion with OpenAI is hypothetical and not supported in GitHub Actions natively.

.github/workflows/label.yml:82

• [nitpick] Referring to Copilot here may confuse readers, since it's a code completion tool rather than a workflow action—consider recommending well-known labeling apps from the GitHub Marketplace instead.

  # If you want advanced label suggestions, consider using GitHub's own Copilot-powered features or a third-party integration.