chore: remove stale bot debug mode flag

[ahmedhamouda78]

Description of changes

Remove the debug mode flag from the stale issues workflow to enable actual closing of stale issues. This removes the debug-only: true parameter that was preventing the stale bot from performing operations and keeping it in dry-run mode only.

Issue #, if available

N/A - Maintenance task to activate stale issues workflow

Description of how you validated changes

• Dry-run correctly identified issue 14441 as stale https://github.com/aws-amplify/amplify-js/actions/runs/17409634915/job/49423259472#step:2:114

Checklist

• PR description included
• yarn test passes
• Unit Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)

Checklist for repo maintainers

• Verify E2E tests for existing workflows are working as expected or add E2E tests for newly added workflows
• New source file paths included in this PR have been added to CODEOWNERS, if appropriate

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.