fix: demote rate limit log to warn

[titan-ron]

Description:

Hi there 👋🏼 For GitHub enterprise, when GH Rate Limit is not enabled, we keep getting error logs although the workflow works as expected.

This PR demotes the error logs from error to warn.

Related issue: None found

Checklist:

• [ ] Mark if documentation changes are required.
• [ ] Mark if tests were added or updated to cover the changes.