fix: Update broken CONTRIBUTING.md link in auto-comment workflows

[Savvythelegend]

This PR resolves the 404 "page not found" error that occurs when a contributor clicks the link to the CONTRIBUTING.md file in the automated Issue and PR comment workflows.

The link was broken because the file was moved to the new structure (docs/CONTRIBUTING.md), but the automated workflow files were not updated.

This change modifies the hardcoded URL within the two primary auto-comment workflow files, pointing the link to the correct location. This fixes a critical usability bug for all new contributors.

Fixes #1679

Type of change

• Added a new machine learning frameworks, libraries or software.
• Documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code
• I have made corresponding changes to the documentation (Only fixing a link, no actual documentation content changed)
• My changes generate no new warnings

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊